function SelectList(id, multiple, expandContract) {
	/* Constructor */
	this.id=id;
	this.list={};
	this.selectedItems = new Array();
	this.selectedGroup = null;
	this.canSelectOnlyOneItem = (multiple!='multiple');
	this.expandedByDefault = (expandContract!='contracted');
	this.keysPressed=0;
	this.searches = [];
	this.submittable = true;
	this.selectedSubTab;
}

SelectList.prototype.gec = function(obj, e) {  // gec = Group Expand or Contract
	var contents;
	contents = document.getElementById(this.id +'_'+ obj.parentNode.getAttribute('row') +'contents');
	if (!contents) contents = document.getElementById(this.id +'_'+ obj.parentNode.parentNode.getAttribute('row') +'contents');
	if (obj.src.indexOf('contract') < 0) {
		contents.style.display = 'block';
		obj.src = '/images/interface/contract.gif';
	}
	else {
		contents.style.display = 'none';
		obj.src = '/images/interface/expand.gif';
	}
	if (!e) var e = window.event;
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
}
SelectList.prototype.cg = function(obj) { // cg = click group
	var row = obj.getAttribute('row');
	if (objectSelected(obj)) {
		unselectObject(obj);
		this.selectedGroup = null;
	}
	else {
		if (this.selectedGroup != null && this.selectedGroup != obj) unselectObject(this.selectedGroup);
		selectObject(obj);
		this.selectedGroup = obj;
	}
	for (var i=0; i<this.selectedItems.length; i++)
		unselectObject(this.selectedItems[i]);
	this.selectedItems = new Array();
	this.updateButtons();
}
SelectList.prototype.ct = function(obj) { // ct = click item
	var row = obj.getAttribute('row');
	if (objectSelected(obj)) {
		unselectObject(obj);
		this.removeItemSelection(obj);
		this.showItemInfo();
	}
	else {
		if (this.canSelectOnlyOneItem && this.selectedItems.length > 0) {
			unselectObject(this.selectedItems[0]);
			this.removeItemSelection(this.selectedItems[0]);
		}
		selectObject(obj);
		this.addItemSelection(obj);
		this.showItemInfo(row);
	}
	if (this.selectedGroup != null) {
		unselectObject(this.selectedGroup);
		this.selectedGroup = null;
	}
	this.outputTestIDs();
}
SelectList.prototype.dct = function(obj) { // dct = double-click item
	for (var i=this.selectedItems.length-1; i>=0; --i)
		unselectObject(this.selectedItems[i]);
	this.disableButtons();
	selectObject(obj);
	this.addItemSelection(obj);
	this.outputTestIDs();
	this.setEvent('beginTest', 'testing');
	document.forms[0].submit();
}
SelectList.prototype.dcc = function(obj) { // dcg = double-click group
	for (var i=this.selectedItems.length-1; i>=0; --i)
		unselectObject(this.selectedItems[i]);
	this.disableButtons();
	selectObject(obj);
	this.setEvent('default', '');
	document.forms[0].submit();
}
SelectList.prototype.addItemSelection = function(obj) {
	var itemNotFound = true;
	var row = obj.getAttribute('row');
	for (var i=0; i<this.selectedItems.length; i++)
		if (this.list.id[this.selectedItems[i].getAttribute('row')] == this.list.id[row])
			itemNotFound = false;
	if (itemNotFound) {
		this.selectedItems[this.selectedItems.length] = obj;
	}
}
SelectList.prototype.removeItemSelection = function(obj) {
	var row = obj.getAttribute('row');
	for (var i=this.selectedItems.length-1; i>=0; i--)
		if (this.list.id[this.selectedItems[i].getAttribute('row')] == this.list.id[row] || this.selectedItems[i] == null)
			this.selectedItems.splice(i, 1);
	while (this.selectedItems[this.selectedItems.length-1] == null && this.selectedItems.length > 0) this.selectedItems.pop();
}
SelectList.prototype.clearSelections = function() {
	this.selectedItems = new Array();
	this.selectedGroup = null;
	this.updateButtons();
}

objectSelected = function(obj) {
	return (obj.className.indexOf('Selected') > 0)
}
selectObject = function(obj) {
	if (!objectSelected(obj))
		obj.className = (obj.className + 'Selected');
}
unselectObject = function(obj) {
	if (objectSelected(obj))
		obj.className = obj.className.substring(0, obj.className.indexOf('Selected'));
}

/* The following functions should be overridden to implement each instance */

SelectList.prototype.search = function() {
	/* This function should be overridden for each instance */
}
SelectList.prototype.updateList = function(list) {
	if (list != undefined)
		this.list=list;
	/* This function should be overridden for each instance */
}
SelectList.prototype.showItemInfo = function(row) {
	/* This function should be overridden for each instance */
}
SelectList.prototype.updateButtons = function() {
	/* This function should be overridden for each instance */
}
SelectList.prototype.disableButtons = function() {
	/* This function should be overridden for each instance */
}
SelectList.prototype.outputTestIDs = function() {
	/* This function should be overridden for each instance */
}
SelectList.prototype.setEvent = function(event, section) {
	/* This function should be overridden for each instance */
}


SelectList.prototype.isSubmittable = function() {
	return this.submittable;
}
SelectList.prototype.makeSubmittable = function(canBeSubmitted) {
	this.submittable = canBeSubmitted;
	return true;
}
SelectList.prototype.findExistingSearch = function(criteria) {
	for (s=0; s < this.searches.length; s++)
		if (this.searches[s].criteria == criteria.substr(0, this.searches[s].criteria.length) && this.searches[s].criteria.length <= criteria.length)
			return s;
	return undefined;
}
SelectList.prototype.confirmSearch = function() {
	var criteria = document.getElementById(this.id+'_criteria').value;
	if (criteria.length <= 4) {
		var doSearch = window.confirm("You have entered only " + criteria.length + " characters. This could return a long list of results. Continue?");
		if (doSearch)
			this.searchFor(criteria);
	} else {
		this.keysPressed++;
		this.searchFor(criteria);
	}
	this.makeSubmittable(false);
}
SelectList.prototype.criteriaKeyPressed = function(e) {
	/* This function should be overridden for each instance */
}
SelectList.prototype.criteriaChanged = function(keyCount) {
	/* This function should be overridden for each instance */
}
SelectList.prototype.filterSearchResults = function(list, criteria) {
	/* This function should be overridden for each instance */
}
SelectList.prototype.searchFor = function(criteria) {
	/* This function should be overridden for each instance */
}
SelectList.prototype.showSubTab = function(obj) {
	if (obj.getAttribute('id') == this.selectedSubTab.getAttribute('id')) return false;
	obj.className='selected';
	var content=document.getElementById(obj.getAttribute('id') + 'Content');
	if (content)
		content.style.display='block';
	this.selectedSubTab.className='';
	content=document.getElementById(this.selectedSubTab.getAttribute('id') + 'Content');
	if (content)
		content.style.display='none';
	this.selectedSubTab = obj;
}

function isNumeric(str) {
	for (cnum=0; cnum<str.length; cnum++)
		if (str.charCodeAt(cnum)>57 || str.charCodeAt(cnum)<48)
			return false;
	return true;
}
function shortDate(aDate) {
	if (aDate == undefined || aDate == '') return '';
	var theDate = new Date(aDate);
	return (theDate.getMonth()+1).toString() + '/' + theDate.getDate() + '/' + theDate.getFullYear();
}
function shortTime(aDate) {
	if (aDate == undefined || aDate == '') return '';
	var theDate = new Date(aDate);
	return (theDate.getHours()%12 == 0?'12':(theDate.getHours() % 12).toString()) + ':' + (theDate.getMinutes()<=9?'0'+theDate.getMinutes():theDate.getMinutes()) + '&nbsp;' + (theDate.getHours() >= 12? 'PM':'AM');
}