/**
 * addEvent written by Dean Edwards, 2005
 * with input from Tino Zijdel
 *
 * http://dean.edwards.name/weblog/2005/10/add-event/
 **/
function addEvent(element, type, handler) {
	// assign each event handler a unique ID
	if (!handler.$$guid) handler.$$guid = addEvent.guid++;
	// create a hash table of event types for the element
	if (!element.events) element.events = {};
	// create a hash table of event handlers for each element/event pair
	var handlers = element.events[type];
	if (!handlers) {
		handlers = element.events[type] = {};
		// store the existing event handler (if there is one)
		if (element["on" + type]) {
			handlers[0] = element["on" + type];
		}
	}
	// store the event handler in the hash table
	handlers[handler.$$guid] = handler;
	// assign a global event handler to do all the work
	element["on" + type] = handleEvent;
};
// a counter used to create unique IDs
addEvent.guid = 1;

function removeEvent(element, type, handler) {
	// delete the event handler from the hash table
	if (element.events && element.events[type]) {
		delete element.events[type][handler.$$guid];
	}
};

function handleEvent(event) {
	var returnValue = true;
	// grab the event object (IE uses a global event object)
	event = event || fixEvent(window.event);
	// get a reference to the hash table of event handlers
	var handlers = this.events[event.type];
	// execute each event handler
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
};

function fixEvent(event) {
	// add W3C standard event methods
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
};
fixEvent.preventDefault = function() {
	this.returnValue = false;
};
fixEvent.stopPropagation = function() {
	this.cancelBubble = true;
};

// end from Dean Edwards


/**
 * Creates an Element for insertion into the DOM tree.
 * From http://simon.incutio.com/archive/2003/06/15/javascriptWithXML
 *
 * @param element the element type to be created.
 *				e.g. ul (no angle brackets)
 **/
function createElement(element) {
	if (typeof document.createElementNS != 'undefined') {
		return document.createElementNS('http://www.w3.org/1999/xhtml', element);
	}
	if (typeof document.createElement != 'undefined') {
		return document.createElement(element);
	}
	return false;
}

/**
 * "targ" is the element which caused this function to be called
 * from http://www.quirksmode.org/js/events_properties.html
 **/
function getEventTarget(e) {
	var targ;
	if (!e) {
		e = window.event;
	}
	if (e.target) {
		targ = e.target;
	} else if (e.srcElement) {
		targ = e.srcElement;
	}
	if (targ.nodeType == 3) { // defeat Safari bug
		targ = targ.parentNode;
	}

	return targ;
}


/**
 * Written by Neil Crosby. 
 * http://www.workingwith.me.uk/
 *
 * Use this wherever you want, but please keep this comment at the top of this file.
 *
 * Copyright (c) 2006 Neil Crosby
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of this software and associated documentation files (the "Software"), to deal 
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
 * copies of the Software, and to permit persons to whom the Software is 
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
 * SOFTWARE.
 **/
var css = {
	/**
	 * Returns an array containing references to all elements
	 * of a given tag type within a certain node which have a given class
	 *
	 * @param node		the node to start from 
	 *					(e.g. document, 
	 *						  getElementById('whateverStartpointYouWant')
	 *					)
	 * @param searchClass the class we're wanting
	 *					(e.g. 'some_class')
	 * @param tag		 the tag that the found elements are allowed to be
	 *					(e.g. '*', 'div', 'li')
	 **/
	getElementsByClass : function(node, searchClass, tag) {
		var classElements = new Array();
		var els = node.getElementsByTagName(tag);
		var elsLen = els.length;
		var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
		
		
		for (var i = 0, j = 0; i < elsLen; i++) {
			if (this.elementHasClass(els[i], searchClass) ) {
				classElements[j] = els[i];
				j++;
			}
		}
		return classElements;
	},


	/**
	 * PRIVATE.  Returns an array containing all the classes applied to this
	 * element.
	 *
	 * Used internally by elementHasClass(), addClassToElement() and 
	 * removeClassFromElement().
	 **/
	privateGetClassArray: function(el) {
		return el.className.split(' '); 
	},

	/**
	 * PRIVATE.  Creates a string from an array of class names which can be used 
	 * by the className function.
	 *
	 * Used internally by addClassToElement().
	 **/
	privateCreateClassString: function(classArray) {
		return classArray.join(' ');
	},

	/**
	 * Returns true if the given element has been assigned the given class.
	 **/
	elementHasClass: function(el, classString) {
		if (!el) {
			return false;
		}
		
		var regex = new RegExp('\\b'+classString+'\\b');
		if (el.className.match(regex)) {
			return true;
		}

		return false;
	},

	/**
	 * Adds classString to the classes assigned to the element with id equal to
	 * idString.
	 **/
	addClassToId: function(idString, classString) {
		this.addClassToElement(document.getElementById(idString), classString);
	},

	/**
	 * Adds classString to the classes assigned to the given element.
	 * If the element already has the class which was to be added, then
	 * it is not added again.
	 **/
	addClassToElement: function(el, classString) {
		var classArray = this.privateGetClassArray(el);

		if (this.elementHasClass(el, classString)) {
			return; // already has element so don't need to add it
		}

		classArray.push(classString);

		el.className = this.privateCreateClassString(classArray);
	},

	/**
	 * Removes the given classString from the list of classes assigned to the
	 * element with id equal to idString
	 **/
	removeClassFromId: function(idString, classString) {
		this.removeClassFromElement(document.getElementById(idString), classString);
	},

	/**
	 * Removes the given classString from the list of classes assigned to the
	 * given element.  If the element has the same class assigned to it twice, 
	 * then only the first instance of that class is removed.
	 **/
	removeClassFromElement: function(el, classString) {
		var classArray = this.privateGetClassArray(el);

		for (x in classArray) {
			if (classString == classArray[x]) {
				classArray[x] = '';
				break;
			}
		}

		el.className = this.privateCreateClassString(classArray);
	}
}
/**
This is a JavaScript library that will allow you to easily add some basic DHTML
drop-down datepicker functionality to your Notes forms. This script is not as
full-featured as others you may find on the Internet, but it's free, it's easy to
understand, and it's easy to change.

You'll also want to include a stylesheet that makes the datepicker elements
look nice. An example one can be found in the database that this script was
originally released with, at:

http://www.nsftools.com/tips/NotesTips.htm#datepicker

I've tested this lightly with Internet Explorer 6 and Mozilla Firefox. I have no idea
how compatible it is with other browsers.

version 1.5
December 4, 2005
Julian Robichaux -- http://www.nsftools.com

HISTORY
--  version 1.0 (Sept. 4, 2004):
Initial release.

--  version 1.1 (Sept. 5, 2004):
Added capability to define the date format to be used, either globally (using the
defaultDateSeparator and defaultDateFormat variables) or when the displayDatePicker
function is called.

--  version 1.2 (Sept. 7, 2004):
Fixed problem where datepicker x-y coordinates weren't right inside of a table.
Fixed problem where datepicker wouldn't display over selection lists on a page.
Added a call to the datePickerClosed function (if one exists) after the datepicker
is closed, to allow the developer to add their own custom validation after a date
has been chosen. For this to work, you must have a function called datePickerClosed
somewhere on the page, that accepts a field object as a parameter. See the
example in the comments of the updateDateField function for more details.

--  version 1.3 (Sept. 9, 2004)
Fixed problem where adding the <div> and <iFrame> used for displaying the datepicker
was causing problems on IE 6 with global variables that had handles to objects on
the page (I fixed the problem by adding the elements using document.createElement()
and document.body.appendChild() instead of document.body.innerHTML += ...).

--  version 1.4 (Dec. 20, 2004)
Added "targetDateField.focus();" to the updateDateField function (as suggested
by Alan Lepofsky) to avoid a situation where the cursor focus is at the top of the
form after a date has been picked. Added "padding: 0px;" to the dpButton CSS
style, to keep the table from being so wide when displayed in Firefox.

-- version 1.5 (Dec 4, 2005)
Added display=none when datepicker is hidden, to fix problem where cursor is
not visible on input fields that are beneath the date picker. Added additional null
date handling for date errors in Safari when the date is empty. Added additional
error handling for iFrame creation, to avoid reported errors in Opera. Added
onMouseOver event for day cells, to allow color changes when the mouse hovers
over a cell (to make it easier to determine what cell you're over). Added comments
in the style sheet, to make it more clear what the different style elements are for.
*/

var datePickerDivID = "datepicker";
var iFrameDivID = "datepickeriframe";

var dayArrayShort = new Array('Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa');
var dayArrayMed = new Array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
var dayArrayLong = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
var monthArrayShort = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
var monthArrayMed = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec');
var monthArrayLong = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
 
// these variables define the date formatting we're expecting and outputting.
// If you want to use a different format by default, change the defaultDateSeparator
// and defaultDateFormat variables either here or on your HTML page.
var defaultDateSeparator = "/";        // common values would be "/" or "."
var defaultDateFormat = "mdy"    // valid values are "mdy", "dmy", and "ymd"
var dateSeparator = defaultDateSeparator;
var dateFormat = defaultDateFormat;

/**
This is the main function you'll call from the onClick event of a button.
Normally, you'll have something like this on your HTML page:

Start Date: <input name="StartDate">
<input type=button value="select" onclick="displayDatePicker('StartDate');">

That will cause the datepicker to be displayed beneath the StartDate field and
any date that is chosen will update the value of that field. If you'd rather have the
datepicker display beneath the button that was clicked, you can code the button
like this:

<input type=button value="select" onclick="displayDatePicker('StartDate', this);">

So, pretty much, the first argument (dateFieldName) is a string representing the
name of the field that will be modified if the user picks a date, and the second
argument (displayBelowThisObject) is optional and represents an actual node
on the HTML document that the datepicker should be displayed below.

In version 1.1 of this code, the dtFormat and dtSep variables were added, allowing
you to use a specific date format or date separator for a given call to this function.
Normally, you'll just want to set these defaults globally with the defaultDateSeparator
and defaultDateFormat variables, but it doesn't hurt anything to add them as optional
parameters here. An example of use is:

<input type=button value="select" onclick="displayDatePicker('StartDate', false, 'dmy', '.');">

This would display the datepicker beneath the StartDate field (because the
displayBelowThisObject parameter was false), and update the StartDate field with
the chosen value of the datepicker using a date format of dd.mm.yyyy
*/
function displayDatePicker(dateFieldName, displayBelowThisObject, dtFormat, dtSep)
{
  var targetDateField = document.getElementsByName (dateFieldName).item(0);
 
  // if we weren't told what node to display the datepicker beneath, just display it
  // beneath the date field we're updating
  if (!displayBelowThisObject)
    displayBelowThisObject = targetDateField;
 
  // if a date separator character was given, update the dateSeparator variable
  if (dtSep)
    dateSeparator = dtSep;
  else
    dateSeparator = defaultDateSeparator;
 
  // if a date format was given, update the dateFormat variable
  if (dtFormat)
    dateFormat = dtFormat;
  else
    dateFormat = defaultDateFormat;
 
  var x = displayBelowThisObject.offsetLeft;
  var y = displayBelowThisObject.offsetTop + displayBelowThisObject.offsetHeight ;
 
  // deal with elements inside tables and such
  var parent = displayBelowThisObject;
  while (parent.offsetParent) {
    parent = parent.offsetParent;
    x += parent.offsetLeft;
    y += parent.offsetTop ;
  }
 
  drawDatePicker(targetDateField, x, y);
}


/**
Draw the datepicker object (which is just a table with calendar elements) at the
specified x and y coordinates, using the targetDateField object as the input tag
that will ultimately be populated with a date.

This function will normally be called by the displayDatePicker function.
*/
function drawDatePicker(targetDateField, x, y)
{
  var dt = getFieldDate(targetDateField.value );
 
  // the datepicker table will be drawn inside of a <div> with an ID defined by the
  // global datePickerDivID variable. If such a div doesn't yet exist on the HTML
  // document we're working with, add one.
  if (!document.getElementById(datePickerDivID)) {
    // don't use innerHTML to update the body, because it can cause global variables
    // that are currently pointing to objects on the page to have bad references
    //document.body.innerHTML += "<div id='" + datePickerDivID + "' class='dpDiv'></div>";
    var newNode = document.createElement("div");
    newNode.setAttribute("id", datePickerDivID);
    newNode.setAttribute("class", "dpDiv");
    newNode.setAttribute("style", "visibility: hidden;");
    document.body.appendChild(newNode);
  }
 
  // move the datepicker div to the proper x,y coordinate and toggle the visiblity
  var pickerDiv = document.getElementById(datePickerDivID);
  pickerDiv.style.position = "absolute";
  pickerDiv.style.left = x + "px";
  pickerDiv.style.top = y + "px";
  pickerDiv.style.visibility = (pickerDiv.style.visibility == "visible" ? "hidden" : "visible");
  pickerDiv.style.display = (pickerDiv.style.display == "block" ? "none" : "block");
  pickerDiv.style.zIndex = 10000;
 
  // draw the datepicker table
  refreshDatePicker(targetDateField.name, dt.getFullYear(), dt.getMonth(), dt.getDate());
}


/**
This is the function that actually draws the datepicker calendar.
*/
function refreshDatePicker(dateFieldName, year, month, day)
{
  // if no arguments are passed, use today's date; otherwise, month and year
  // are required (if a day is passed, it will be highlighted later)
  var thisDay = new Date();
 
  if ((month >= 0) && (year > 0)) {
    thisDay = new Date(year, month, 1);
  } else {
    day = thisDay.getDate();
    thisDay.setDate(1);
  }
 
  // the calendar will be drawn as a table
  // you can customize the table elements with a global CSS style sheet,
  // or by hardcoding style and formatting elements below
  var crlf = "\r\n";
  var TABLE = "<table cols=7 class='dpTable'>" + crlf;
  var xTABLE = "</table>" + crlf;
  var TR = "<tr class='dpTR'>";
  var TR_title = "<tr class='dpTitleTR'>";
  var TR_days = "<tr class='dpDayTR'>";
  var TR_todaybutton = "<tr class='dpTodayButtonTR'>";
  var xTR = "</tr>" + crlf;
  var TD = "<td class='dpTD' onMouseOut='this.className=\"dpTD\";' onMouseOver=' this.className=\"dpTDHover\";' ";    // leave this tag open, because we'll be adding an onClick event
  var TD_title = "<td colspan=5 class='dpTitleTD'>";
  var TD_buttons = "<td class='dpButtonTD'>";
  var TD_todaybutton = "<td colspan=7 class='dpTodayButtonTD'>";
  var TD_days = "<td class='dpDayTD'>";
  var TD_selected = "<td class='dpDayHighlightTD' onMouseOut='this.className=\"dpDayHighlightTD\";' onMouseOver='this.className=\"dpTDHover\";' ";    // leave this tag open, because we'll be adding an onClick event
  var xTD = "</td>" + crlf;
  var DIV_title = "<div class='dpTitleText'>";
  var DIV_selected = "<div class='dpDayHighlight'>";
  var xDIV = "</div>";
 
  // start generating the code for the calendar table
  var html = TABLE;
 
  // this is the title bar, which displays the month and the buttons to
  // go back to a previous month or forward to the next month
  html += TR_title;
  html += TD_buttons + getButtonCode(dateFieldName, thisDay, -1, "&lt;") + xTD;
  html += TD_title + DIV_title + monthArrayLong[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;
  html += TD_buttons + getButtonCode(dateFieldName, thisDay, 1, "&gt;") + xTD;
  html += xTR;
 
  // this is the row that indicates which day of the week we're on
  html += TR_days;
  for(i = 0; i < dayArrayShort.length; i++)
    html += TD_days + dayArrayShort[i] + xTD;
  html += xTR;
 
  // now we'll start populating the table with days of the month
  html += TR;
 
  // first, the leading blanks
  for (i = 0; i < thisDay.getDay(); i++)
    html += TD + "&nbsp;" + xTD;
 
  // now, the days of the month
  do {
    dayNum = thisDay.getDate();
    TD_onclick = " onclick=\"updateDateField('" + dateFieldName + "', '" + getDateString(thisDay) + "');\">";
    
    if (dayNum == day)
      html += TD_selected + TD_onclick + DIV_selected + dayNum + xDIV + xTD;
    else
      html += TD + TD_onclick + dayNum + xTD;
    
    // if this is a Saturday, start a new row
    if (thisDay.getDay() == 6)
      html += xTR + TR;
    
    // increment the day
    thisDay.setDate(thisDay.getDate() + 1);
  } while (thisDay.getDate() > 1)
 
  // fill in any trailing blanks
  if (thisDay.getDay() > 0) {
    for (i = 6; i > thisDay.getDay(); i--)
      html += TD + "&nbsp;" + xTD;
  }
  html += xTR;
 
  // add a button to allow the user to easily return to today, or close the calendar
  var today = new Date();
  var todayString = "Today is " + dayArrayMed[today.getDay()] + ", " + monthArrayMed[ today.getMonth()] + " " + today.getDate();
  html += TR_todaybutton + TD_todaybutton;
  html += "<button class='dpTodayButton' onClick='refreshDatePicker(\"" + dateFieldName + "\");'>this month</button> ";
  html += "<button class='dpTodayButton' onClick='updateDateField(\"" + dateFieldName + "\");'>close</button>";
  html += xTD + xTR;
 
  // and finally, close the table
  html += xTABLE;
 
  document.getElementById(datePickerDivID).innerHTML = html;
  // add an "iFrame shim" to allow the datepicker to display above selection lists
  adjustiFrame();
}


/**
Convenience function for writing the code for the buttons that bring us back or forward
a month.
*/
function getButtonCode(dateFieldName, dateVal, adjust, label)
{
  var newMonth = (dateVal.getMonth () + adjust) % 12;
  var newYear = dateVal.getFullYear() + parseInt((dateVal.getMonth() + adjust) / 12);
  if (newMonth < 0) {
    newMonth += 12;
    newYear += -1;
  }
 
  return "<button class='dpButton' onClick='refreshDatePicker(\"" + dateFieldName + "\", " + newYear + ", " + newMonth + ");'>" + label + "</button>";
}


/**
Convert a JavaScript Date object to a string, based on the dateFormat and dateSeparator
variables at the beginning of this script library.
*/
function getDateString(dateVal)
{
  var dayString = "00" + dateVal.getDate();
  var monthString = "00" + (dateVal.getMonth()+1);
  dayString = dayString.substring(dayString.length - 2);
  monthString = monthString.substring(monthString.length - 2);
 
  switch (dateFormat) {
    case "dmy" :
      return dayString + dateSeparator + monthString + dateSeparator + dateVal.getFullYear();
    case "ymd" :
      return dateVal.getFullYear() + dateSeparator + monthString + dateSeparator + dayString;
    case "mdy" :
    default :
      return monthString + dateSeparator + dayString + dateSeparator + dateVal.getFullYear();
  }
}


/**
Convert a string to a JavaScript Date object.
*/
function getFieldDate(dateString)
{
  var dateVal;
  var dArray;
  var d, m, y;
 
  try {
    dArray = splitDateString(dateString);
    if (dArray) {
      switch (dateFormat) {
        case "dmy" :
          d = parseInt(dArray[0], 10);
          m = parseInt(dArray[1], 10) - 1;
          y = parseInt(dArray[2], 10);
          break;
        case "ymd" :
          d = parseInt(dArray[2], 10);
          m = parseInt(dArray[1], 10) - 1;
          y = parseInt(dArray[0], 10);
          break;
        case "mdy" :
        default :
          d = parseInt(dArray[1], 10);
          m = parseInt(dArray[0], 10) - 1;
          y = parseInt(dArray[2], 10);
          break;
      }
      dateVal = new Date(y, m, d);
    } else if (dateString) {
      dateVal = new Date(dateString);
    } else {
      dateVal = new Date();
    }
  } catch(e) {
    dateVal = new Date();
  }
 
  return dateVal;
}


/**
Try to split a date string into an array of elements, using common date separators.
If the date is split, an array is returned; otherwise, we just return false.
*/
function splitDateString(dateString)
{
  var dArray;
  if (dateString.indexOf("/") >= 0)
    dArray = dateString.split("/");
  else if (dateString.indexOf(".") >= 0)
    dArray = dateString.split(".");
  else if (dateString.indexOf("-") >= 0)
    dArray = dateString.split("-");
  else if (dateString.indexOf("\\") >= 0)
    dArray = dateString.split("\\");
  else
    dArray = false;
 
  return dArray;
}

/**
Update the field with the given dateFieldName with the dateString that has been passed,
and hide the datepicker. If no dateString is passed, just close the datepicker without
changing the field value.

Also, if the page developer has defined a function called datePickerClosed anywhere on
the page or in an imported library, we will attempt to run that function with the updated
field as a parameter. This can be used for such things as date validation, setting default
values for related fields, etc. For example, you might have a function like this to validate
a start date field:

function datePickerClosed(dateField)
{
  var dateObj = getFieldDate(dateField.value);
  var today = new Date();
  today = new Date(today.getFullYear(), today.getMonth(), today.getDate());
 
  if (dateField.name == "StartDate") {
    if (dateObj < today) {
      // if the date is before today, alert the user and display the datepicker again
      alert("Please enter a date that is today or later");
      dateField.value = "";
      document.getElementById(datePickerDivID).style.visibility = "visible";
      adjustiFrame();
    } else {
      // if the date is okay, set the EndDate field to 7 days after the StartDate
      dateObj.setTime(dateObj.getTime() + (7 * 24 * 60 * 60 * 1000));
      var endDateField = document.getElementsByName ("EndDate").item(0);
      endDateField.value = getDateString(dateObj);
    }
  }
}

*/
function updateDateField(dateFieldName, dateString)
{
  var targetDateField = document.getElementsByName (dateFieldName).item(0);
  if (dateString)
    targetDateField.value = dateString;
 
  var pickerDiv = document.getElementById(datePickerDivID);
  pickerDiv.style.visibility = "hidden";
  pickerDiv.style.display = "none";
 
  adjustiFrame();
  targetDateField.focus();
 
  // after the datepicker has closed, optionally run a user-defined function called
  // datePickerClosed, passing the field that was just updated as a parameter
  // (note that this will only run if the user actually selected a date from the datepicker)
  if ((dateString) && (typeof(datePickerClosed) == "function"))
    datePickerClosed(targetDateField);
}


/**
Use an "iFrame shim" to deal with problems where the datepicker shows up behind
selection list elements, if they're below the datepicker. The problem and solution are
described at:

http://dotnetjunkies.com/WebLog/jking/archive/2003/07/21/488.aspx
http://dotnetjunkies.com/WebLog/jking/archive/2003/10/30/2975.aspx
*/
function adjustiFrame(pickerDiv, iFrameDiv)
{
  // we know that Opera doesn't like something about this, so if we
  // think we're using Opera, don't even try
  var is_opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
  if (is_opera)
    return;
  
  // put a try/catch block around the whole thing, just in case
  try {
    if (!document.getElementById(iFrameDivID)) {
      // don't use innerHTML to update the body, because it can cause global variables
      // that are currently pointing to objects on the page to have bad references
      //document.body.innerHTML += "<iframe id='" + iFrameDivID + "' src='javascript:false;' scrolling='no' frameborder='0'>";
      var newNode = document.createElement("iFrame");
      newNode.setAttribute("id", iFrameDivID);
      newNode.setAttribute("src", "javascript:false;");
      newNode.setAttribute("scrolling", "no");
      newNode.setAttribute ("frameborder", "0");
      document.body.appendChild(newNode);
    }
    
    if (!pickerDiv)
      pickerDiv = document.getElementById(datePickerDivID);
    if (!iFrameDiv)
      iFrameDiv = document.getElementById(iFrameDivID);
    
    try {
      iFrameDiv.style.position = "absolute";
      iFrameDiv.style.width = pickerDiv.offsetWidth;
      iFrameDiv.style.height = pickerDiv.offsetHeight ;
      iFrameDiv.style.top = pickerDiv.style.top;
      iFrameDiv.style.left = pickerDiv.style.left;
      iFrameDiv.style.zIndex = pickerDiv.style.zIndex - 1;
      iFrameDiv.style.visibility = pickerDiv.style.visibility ;
      iFrameDiv.style.display = pickerDiv.style.display;
    } catch(e) {
    }
 
  } catch (ee) {
  }
 
}



function toggle_visibility(headerId, targetId){
  if (document.getElementById){
        target = document.getElementById( targetId );
           if (target.className == "visible"){
              target.className = "invisible";
              header = document.getElementById(headerId);
              if (header) {
              	header.className = "contracted";
              }
           } else {
              target.className = "visible";
              header = document.getElementById(headerId);
              if (header) {
              	header.className = "expanded";
              }
           }
     }
} 

/**
 * Written by Neil Crosby. 
 * http://www.workingwith.me.uk/articles/scripting/standardista_table_sorting
 *
 * This module is based on Stuart Langridge's "sorttable" code.  Specifically, 
 * the determineSortFunction, sortCaseInsensitive, sortDate, sortNumeric, and
 * sortCurrency functions are heavily based on his code.  This module would not
 * have been possible without Stuart's earlier outstanding work.
 *
 * Use this wherever you want, but please keep this comment at the top of this file.
 *
 * Copyright (c) 2006 Neil Crosby
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of this software and associated documentation files (the "Software"), to deal 
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
 * copies of the Software, and to permit persons to whom the Software is 
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
 * SOFTWARE.
 **/
var standardistaTableSorting = {

	that: false,
	isOdd: false,

	sortColumnIndex : -1,
	lastAssignedId : 0,
	newRows: -1,
	lastSortedTable: -1,

	/**
	 * Initialises the Standardista Table Sorting module
	 **/
	init : function() {
		// first, check whether this web browser is capable of running this script
		if (!document.getElementsByTagName) {
			return;
		}
		
		this.that = this;
		
		this.run();
		
	},
	
	/**
	 * Runs over each table in the document, making it sortable if it has a class
	 * assigned named "sortable" and an id assigned.
	 **/
	run : function() {
		var tables = document.getElementsByTagName("table");
		
		for (var i=0; i < tables.length; i++) {
			var thisTable = tables[i];
			
			if (css.elementHasClass(thisTable, 'sortable')) {
				this.makeSortable(thisTable);
			}
		}
	},
	
	/**
	 * Makes the given table sortable.
	 **/
	makeSortable : function(table) {
	
		// first, check if the table has an id.  if it doesn't, give it one
		if (!table.id) {
			table.id = 'sortableTable'+this.lastAssignedId++;
		}
		
		// if this table does not have a thead, we don't want to know about it
		if (!table.tHead || !table.tHead.rows || 0 == table.tHead.rows.length) {
			return;
		}
		
		// we'll assume that the last row of headings in the thead is the row that 
		// wants to become clickable
		var row = table.tHead.rows[table.tHead.rows.length - 1];
		
		for (var i=0; i < row.cells.length; i++) {
		
			// create a link with an onClick event which will 
			// control the sorting of the table
			var linkEl = createElement('a');
			linkEl.href = '#';
			linkEl.onclick = this.headingClicked;
			linkEl.setAttribute('columnId', i);
			linkEl.title = 'Click to sort';
			
			// move the current contents of the cell that we're 
			// hyperlinking into the hyperlink
			var innerEls = row.cells[i].childNodes;
			for (var j = 0; j < innerEls.length; j++) {
				linkEl.appendChild(innerEls[j]);
			}
			
			// and finally add the new link back into the cell
			row.cells[i].appendChild(linkEl);

			var spanEl = createElement('span');
			spanEl.className = 'tableSortArrow';
			spanEl.appendChild(document.createTextNode('\u00A0\u00A0'));
			row.cells[i].appendChild(spanEl);

		}
	
		if (css.elementHasClass(table, 'autostripe')) {
			this.isOdd = false;
			var rows = table.tBodies[0].rows;
		
			// We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
			for (var i=0;i<rows.length;i++) { 
				this.doStripe(rows[i]);
			}
		}
	},
	
	headingClicked: function(e) {
		
		var that = standardistaTableSorting.that;
		
		// linkEl is the hyperlink that was clicked on which caused
		// this method to be called
		var linkEl = getEventTarget(e);
		
		// directly outside it is a td, tr, thead and table
		var td     = linkEl.parentNode;
		var tr     = td.parentNode;
		var thead  = tr.parentNode;
		var table  = thead.parentNode;
		
		// if the table we're looking at doesn't have any rows
		// (or only has one) then there's no point trying to sort it
		if (!table.tBodies || table.tBodies[0].rows.length <= 1) {
			return false;
		}

		// the column we want is indicated by td.cellIndex
		var column = linkEl.getAttribute('columnId') || td.cellIndex;
		//var column = td.cellIndex;
		
		// find out what the current sort order of this column is
		var arrows = css.getElementsByClass(td, 'tableSortArrow', 'span');
		var previousSortOrder = '';
		if (arrows.length > 0) {
			previousSortOrder = arrows[0].getAttribute('sortOrder');
		}
		
		// work out how we want to sort this column using the data in the first cell
		// but just getting the first cell is no good if it contains no data
		// so if the first cell just contains white space then we need to track
		// down until we find a cell which does contain some actual data
		var itm = ''
		var rowNum = 0;
		while ('' == itm && rowNum < table.tBodies[0].rows.length) {
			itm = that.getInnerText(table.tBodies[0].rows[rowNum].cells[column]);
			rowNum++;
		}
		var sortfn = that.determineSortFunction(itm);

		// if the last column that was sorted was this one, then all we need to 
		// do is reverse the sorting on this column
		if (table.id == that.lastSortedTable && column == that.sortColumnIndex) {
			newRows = that.newRows;
			newRows.reverse();
		// otherwise, we have to do the full sort
		} else {
			that.sortColumnIndex = column;
			var newRows = new Array();

			for (var j = 0; j < table.tBodies[0].rows.length; j++) { 
				newRows[j] = table.tBodies[0].rows[j]; 
			}

			newRows.sort(sortfn);
		}

		that.moveRows(table, newRows);
		that.newRows = newRows;
		that.lastSortedTable = table.id;
		
		// now, give the user some feedback about which way the column is sorted
		
		// first, get rid of any arrows in any heading cells
		var arrows = css.getElementsByClass(tr, 'tableSortArrow', 'span');
		for (var j = 0; j < arrows.length; j++) {
			var arrowParent = arrows[j].parentNode;
			arrowParent.removeChild(arrows[j]);

			if (arrowParent != td) {
				spanEl = createElement('span');
				spanEl.className = 'tableSortArrow';
				spanEl.appendChild(document.createTextNode('\u00A0\u00A0'));
				arrowParent.appendChild(spanEl);
			}
		}
		
		// now, add back in some feedback 
		var spanEl = createElement('span');
		spanEl.className = 'tableSortArrow';
		if (null == previousSortOrder || '' == previousSortOrder || 'DESC' == previousSortOrder) {
			spanEl.appendChild(document.createTextNode(' \u2191'));
			spanEl.setAttribute('sortOrder', 'ASC');
		} else {
			spanEl.appendChild(document.createTextNode(' \u2193'));
			spanEl.setAttribute('sortOrder', 'DESC');
		}
		
		td.appendChild(spanEl);
		
		return false;
	},

	getInnerText : function(el) {
		
		if ('string' == typeof el || 'undefined' == typeof el) {
			return el;
		}
		
		if (el.innerText) {
			return el.innerText;  // Not needed but it is faster
		}

		var str = el.getAttribute('standardistaTableSortingInnerText');
		if (null != str && '' != str) {
			return str;
		}
		str = '';

		var cs = el.childNodes;
		var l = cs.length;
		for (var i = 0; i < l; i++) {
			// 'if' is considerably quicker than a 'switch' statement, 
			// in Internet Explorer which translates up to a good time 
			// reduction since this is a very often called recursive function
			if (1 == cs[i].nodeType) { // ELEMENT NODE
				str += this.getInnerText(cs[i]);
				break;
			} else if (3 == cs[i].nodeType) { //TEXT_NODE
				str += cs[i].nodeValue;
				break;
			}
		}
		
		// set the innertext for this element directly on the element
		// so that it can be retrieved early next time the innertext
		// is requested
		el.setAttribute('standardistaTableSortingInnerText', str);
		
		return str;
	},

	determineSortFunction : function(itm) {
		
		var sortfn = this.sortCaseInsensitive;
		
		if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) {
			sortfn = this.sortDate;
		}
		if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) {
			sortfn = this.sortDate;
		}
		if (itm.match(/^[£$]/)) {
			sortfn = this.sortCurrency;
		}
		if (itm.match(/^\d?\.?\d+$/)) {
			sortfn = this.sortNumeric;
		}
		if (itm.match(/^[+-]?\d*\.?\d+([eE]-?\d+)?$/)) {
			sortfn = this.sortNumeric;
		}
    		if (itm.match(/^([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])$/)) {
        		sortfn = this.sortIP;
   		}
		if (itm.match(/^[+-]?(\d|,|\.)*$/)) {
			sortfn = this.sortNumericComma;
		}
		if (itm.match(/^[+-]?\d*\.?\d+%$/)) {
			sortfn = this.sortPercentage;
		}

		return sortfn;
	},
	
	sortCaseInsensitive : function(a, b) {
		var that = standardistaTableSorting.that;
		
		var aa = that.getInnerText(a.cells[that.sortColumnIndex]).toLowerCase();
		var bb = that.getInnerText(b.cells[that.sortColumnIndex]).toLowerCase();
		if (aa==bb) {
			return 0;
		} else if (aa<bb) {
			return -1;
		} else {
			return 1;
		}
	},
	
	sortDate : function(a,b) {
		var that = standardistaTableSorting.that;

		// y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
		var aa = that.getInnerText(a.cells[that.sortColumnIndex]);
		var bb = that.getInnerText(b.cells[that.sortColumnIndex]);
		
		var dt1, dt2, yr = -1;
		
		if (aa.length == 10) {
			dt1 = aa.substr(6,4)+aa.substr(3,2)+aa.substr(0,2);
		} else {
			yr = aa.substr(6,2);
			if (parseInt(yr) < 50) { 
				yr = '20'+yr; 
			} else { 
				yr = '19'+yr; 
			}
			dt1 = yr+aa.substr(3,2)+aa.substr(0,2);
		}
		
		if (bb.length == 10) {
			dt2 = bb.substr(6,4)+bb.substr(3,2)+bb.substr(0,2);
		} else {
			yr = bb.substr(6,2);
			if (parseInt(yr) < 50) { 
				yr = '20'+yr; 
			} else { 
				yr = '19'+yr; 
			}
			dt2 = yr+bb.substr(3,2)+bb.substr(0,2);
		}
		
		if (dt1==dt2) {
			return 0;
		} else if (dt1<dt2) {
			return -1;
		}
		return 1;
	},

	sortCurrency : function(a,b) { 
		var that = standardistaTableSorting.that;

		var aa = that.getInnerText(a.cells[that.sortColumnIndex]).replace(/[^0-9.]/g,'');
		var bb = that.getInnerText(b.cells[that.sortColumnIndex]).replace(/[^0-9.]/g,'');
		return parseFloat(aa) - parseFloat(bb);
	},

	sortPercentage : function(a,b) { 
		var that = standardistaTableSorting.that;

		var aa = that.getInnerText(a.cells[that.sortColumnIndex]).replace(/[^0-9.+-]/g,'');
		var bb = that.getInnerText(b.cells[that.sortColumnIndex]).replace(/[^0-9.+-]/g,'');
		return parseFloat(aa) - parseFloat(bb);
	},

	sortNumeric : function(a,b) { 
		var that = standardistaTableSorting.that;

		var aa = parseFloat(that.getInnerText(a.cells[that.sortColumnIndex]));
		if (isNaN(aa)) { 
			aa = 0;
		}
		var bb = parseFloat(that.getInnerText(b.cells[that.sortColumnIndex])); 
		if (isNaN(bb)) { 
			bb = 0;
		}
		return aa-bb;
	},

	sortNumericComma : function(a,b) { 
		var that = standardistaTableSorting.that;

		var aa = parseFloat(that.getInnerText(a.cells[that.sortColumnIndex]).replace(/[,]/g,''));
		if (isNaN(aa)) { 
			aa = 0;
		}
		var bb = parseFloat(that.getInnerText(b.cells[that.sortColumnIndex]).replace(/[,]/g,'')); 
		if (isNaN(bb)) { 
			bb = 0;
		}
		return aa-bb;
	},

	makeStandardIPAddress : function(val) {
		var vals = val.split('.');

		for (x in vals) {
			val = vals[x];

			while (3 > val.length) {
				val = '0'+val;
			}
			vals[x] = val;
		}

		val = vals.join('.');

		return val;
	},

	sortIP : function(a,b) { 
		var that = standardistaTableSorting.that;

		var aa = that.makeStandardIPAddress(that.getInnerText(a.cells[that.sortColumnIndex]).toLowerCase());
		var bb = that.makeStandardIPAddress(that.getInnerText(b.cells[that.sortColumnIndex]).toLowerCase());
		if (aa==bb) {
			return 0;
		} else if (aa<bb) {
			return -1;
		} else {
			return 1;
		}
	},

	moveRows : function(table, newRows) {
		this.isOdd = false;

		// We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
		for (var i=0;i<newRows.length;i++) { 
			var rowItem = newRows[i];

			this.doStripe(rowItem);

			table.tBodies[0].appendChild(rowItem); 
		}
	},
	
	doStripe : function(rowItem) {
		if (this.isOdd) {
			css.addClassToElement(rowItem, 'odd');
		} else {
			css.removeClassFromElement(rowItem, 'odd');
		}
		
		this.isOdd = !this.isOdd;
	}

}

function standardistaTableSortingInit() {
	standardistaTableSorting.init();
}

addEvent(window, 'load', standardistaTableSortingInit)