/**
 * X-browser event handler attachment and detachment
 *
 * @argument obj - the object to attach event to
 * @argument evType - name of the event - DONT ADD "on", pass only "mouseover", etc
 * @argument fn - function to call
 */
function addEvent(obj, evType, fn)
	{
	if (obj.addEventListener)
		{
		obj.addEventListener(evType, fn, false);
		return true;
		}
	else if (obj.attachEvent)
		{
		var r = obj.attachEvent("on"+evType, fn);
		return r;
		}
	else
		{return false;}
	}


function removeEvent(obj, evType, fn, useCapture)
	{
	if (obj.removeEventListener)
		{
		obj.removeEventListener(evType, fn, useCapture);
		return true;
		}
	else if (obj.detachEvent)
		{
		var r = obj.detachEvent("on"+evType, fn);
		return r;
		}
	else 
		{alert("Handler could not be removed");}
	}


function getViewportHeight() 
	{
	if (window.innerHeight!=window.undefined) return window.innerHeight;
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight;
	if (document.body) return document.body.clientHeight; 

	return window.undefined; 
	}


function getViewportWidth() 
	{
	var offset = 17;
	var width = null;
	if (window.innerWidth!=window.undefined) return window.innerWidth; 
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth; 
	if (document.body) return document.body.clientWidth; 
	}


function getScrollTop() 
	{
	if (self.pageYOffset) // all except Explorer
		{return self.pageYOffset;}
	else if (document.documentElement && document.documentElement.scrollTop) // Explorer 6 Strict
		{return document.documentElement.scrollTop;}
	else if (document.body) // all other Explorers
		{return document.body.scrollTop;}
	}


function getScrollLeft() 
	{
	if (self.pageXOffset) // all except Explorer
		{return self.pageXOffset;}
	 else if (document.documentElement && document.documentElement.scrollLeft) // Explorer 6 Strict
		{return document.documentElement.scrollLeft;}
	else if (document.body) // all other Explorers
		{return document.body.scrollLeft;}
	}





/**
 * SUBMODAL v1.6
 * Used for displaying DHTML-only popups instead of using buggy modal windows.
 */

var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;
//var gDefaultPage = "/common/subModal/loading.html";  // To pre-load page into IFrame
var gHideSelects = false;
var gReturnVal = null;
var gTabIndexes = new Array();
var gTabbableTags = new Array("A","BUTTON","TEXTAREA","INPUT","IFRAME");   // Pre-defined list of tags we want to disable/enable tabbing into

// If using Mozilla or Firefox, use Tab-key trap.
if (!document.all) 
	{document.onkeypress = keyDownHandler;}


function initPopUp(wdd, htt) 
	{
	// Add the HTML to the body
	theBody = document.getElementsByTagName('BODY')[0];
	popmask = document.createElement('div');
	popmask.id = 'popupMask';
	popcont = document.createElement('div');
	popcont.id = 'popupContainer';
	popcont.className = 'bodyElmntClass';
	popcont.innerHTML = '' +
		'<div id="popupInner">' +
//			'<div id="popupTitleBar">' +
//				'<div id="popupTitle"></div>' +
//				'<div id="popupControls">' +
//					'<img src="/common/subModal/close.gif" onclick="hidePopWin(false);" id="popCloseBox" style="padding-right:4px;">' +
//				'</div>' +
//			'</div>' +
			'<iframe name="popupFrame" id="popupFrame" style="width:100%; height:'+ htt +'px; background-color:transparent;" scrolling="auto" frameborder="0" allowtransparency="true" width="100%" height="'+ htt +'"></iframe>' +
//			'<iframe name="popupFrame" id="popupFrame" src="'+ gDefaultPage +'" style="width:100%; height:'+ htt +'px; background-color:transparent;" scrolling="auto" frameborder="0" allowtransparency="true" width="100%" height="'+ htt +'"></iframe>' +
		'</div>';
	theBody.appendChild(popmask);
	theBody.appendChild(popcont);
	
	gPopupMask = document.getElementById("popupMask");
	gPopupContainer = document.getElementById("popupContainer");
	gPopFrame = document.getElementById("popupFrame");	

	gPopupContainer.style.width = wdd+'px';
	gPopupContainer.style.height = htt+'px';

	
	// check to see if this is IE version 6 or lower. hide select boxes if so
	var brsVersion = parseInt(window.navigator.appVersion.charAt(0), 10);
	if (brsVersion <= 6 && window.navigator.userAgent.indexOf("MSIE") > -1)
		{gHideSelects = true;}
	
	// Add onclick handlers to 'a' elements of class submodal or submodal-width-height
	var elms = document.getElementsByTagName('a');
	for (i = 0; i < elms.length; i++) 
		{
		if (elms[i].className.indexOf("submodal") == 0) 
			{ 
			// var onclick = 'function (){showPopWin(\''+elms[i].href+'\','+width+', '+height+', null);return false;};';
			// elms[i].onclick = eval(onclick);
			elms[i].onclick = function(){
				// default width and height
				var width = 400;
				var height = 200;
				// Parse out optional width and height from className
				params = this.className.split('-');
				if (params.length == 3) 
					{
					width = parseInt(params[1]);
					height = parseInt(params[2]);
					}
				showPopWin(this.href,width,height,null); return false;
				}
			}
		}
	}


//  Better to load initPopUp in the BODY tag onLoad.
//addEvent(window, "load", initPopUp);


	/*
	* @argument width - int in pixels
	* @argument height - int in pixels
	* @argument url - url to display
	* @argument returnFunc - function to call when returning true from the window.
	* @argument showCloseBox - show the close box - default true
	*/
function showPopWin(url, width, height, returnFunc, showCloseBox) 
	{
	// show or hide the window close widget
//	if (showCloseBox == null || showCloseBox == true) 
//		{document.getElementById("popCloseBox").style.display = "block";}
//	else 
//		{document.getElementById("popCloseBox").style.display = "none";}
	gPopupIsShown = true;
	disableTabIndexes();
	gPopupMask.style.display = "block";
	gPopupContainer.style.display = "block";
	// calculate where to place the window on screen
	centerPopWin(width, height);
	
//	var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
	var titleBarHeight = 0;

	gPopupContainer.style.width = width + "px";
	gPopupContainer.style.height = (height+titleBarHeight) + "px";
	
	setMaskSize();

	// need to set the width of the iframe to the title bar width because of the dropshadow
	// some oddness was occuring and causing the frame to poke outside the border in IE6
//	gPopFrame.style.width = parseInt(document.getElementById("popupTitleBar").offsetWidth, 10) + "px";
	gPopFrame.style.height = (height-20) + "px";
	
	// set the url
	gPopFrame.src = url;

	gReturnFunc = returnFunc;
	// for IE
	if (gHideSelects == true) 
		{hideSelectBoxes();}
	
	window.setTimeout("setPopTitle();", 600);
	}


var gi = 0;

function centerPopWin(width, height) 
	{
	if (gPopupIsShown == true) 
		{
		if (width == null || isNaN(width)) 
			{width = gPopupContainer.offsetWidth;}
		if (height == null) 
			{height = gPopupContainer.offsetHeight;}
		
		//var theBody = document.documentElement;
		var theBody = document.getElementsByTagName("BODY")[0];
		//theBody.style.overflow = "hidden";
		var scTop = parseInt(getScrollTop(),10);
		var scLeft = parseInt(theBody.scrollLeft,10);
	
		setMaskSize();
		
		//window.status = gPopupMask.style.top + " " + gPopupMask.style.left + " " + gi++;
		
//		var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
		var titleBarHeight = 0;
		
		var fullHeight = getViewportHeight();
		var fullWidth = getViewportWidth();
		
		gPopupContainer.style.top = "60px";
//		gPopupContainer.style.top = (scTop + ((fullHeight - (height+titleBarHeight)) / 2)) + "px";
		gPopupContainer.style.left =  (scLeft + ((fullWidth - width) / 2)) + "px";
		//alert(fullWidth + " " + width + " " + gPopupContainer.style.left);
		}
	}

addEvent(window, "resize", centerPopWin);
addEvent(window, "scroll", centerPopWin);
window.onscroll = centerPopWin;


function setMaskSize() 
	{
	var theBody = document.getElementsByTagName("BODY")[0];
			
	var fullHeight = getViewportHeight();
	var fullWidth = getViewportWidth();
	
	// Determine what's bigger, scrollHeight or fullHeight / width
	if (fullHeight > theBody.scrollHeight) 
		{popHeight = fullHeight;}
	else 
		{popHeight = theBody.scrollHeight;}
	
	if (fullWidth > theBody.scrollWidth) 
		{popWidth = fullWidth;} 
	else 
		{popWidth = theBody.scrollWidth;}
	
	gPopupMask.style.height = popHeight + "px";
	gPopupMask.style.width = popWidth + "px";
	}

/**
 * @argument callReturnFunc - bool - determines if we call the return function specified
 * @argument returnVal - anything - return value 
 */
function hidePopWin(callReturnFunc) 
	{
	gPopupIsShown = false;
	var theBody = document.getElementsByTagName("BODY")[0];
	theBody.style.overflow = "";
	restoreTabIndexes();
	if (gPopupMask == null) 
		{return;}
	gPopupMask.style.display = "none";
	gPopupContainer.style.display = "none";
	if (callReturnFunc == true && gReturnFunc != null) 
		{
		// Set the return code to run in a timeout.
		// Was having issues using with an Ajax.Request();
		gReturnVal = window.frames["popupFrame"].returnVal;
		window.setTimeout('gReturnFunc(gReturnVal);', 1);
		}

//	gPopFrame.src = gDefaultPage;
	// display all select boxes
	if (gHideSelects == true) 
		{displaySelectBoxes();}
	}


/**
 * Sets the popup title based on the title of the html document it contains.
 * Uses a timeout to keep checking until the title is valid.
 */
function setPopTitle() 
	{
	return;
	if (window.frames["popupFrame"].document.title == null) 
		{window.setTimeout("setPopTitle();", 10);} 
	else 
		{document.getElementById("popupTitle").innerHTML = window.frames["popupFrame"].document.title;}
	}


// Tab key trap. iff popup is shown and key was [TAB], suppress it.
// @argument e - event - keyboard event that caused this function to be called.
function keyDownHandler(e) 
	{
	if (gPopupIsShown && e.keyCode == 9)  
		{return false;}
	}


// For IE.  Go through predefined tags and disable tabbing into them.
function disableTabIndexes() 
	{
	if (document.all) 
		{
		var i = 0;
		for (var j = 0; j < gTabbableTags.length; j++) 
			{
			var tagElements = document.getElementsByTagName(gTabbableTags[j]);
			for (var k = 0 ; k < tagElements.length; k++) 
				{
				gTabIndexes[i] = tagElements[k].tabIndex;
				tagElements[k].tabIndex="-1";
				i++;
				}
			}
		}
	}


// For IE. Restore tab-indexes.
function restoreTabIndexes() 
	{
	if (document.all) 
		{
		var i = 0;
		for (var j = 0; j < gTabbableTags.length; j++) 
			{
			var tagElements = document.getElementsByTagName(gTabbableTags[j]);
			for (var k = 0 ; k < tagElements.length; k++) 
				{
				tagElements[k].tabIndex = gTabIndexes[i];
				tagElements[k].tabEnabled = true;
				i++;
				}
			}
		}
	}


/**
 * Hides all drop down form select boxes on the screen so they do not appear above the mask layer.
 * IE has a problem with wanted select form tags to always be the topmost z-index or layer
 */
function hideSelectBoxes() 
	{
	var x = document.getElementsByTagName("SELECT");

	for (i=0;x && i < x.length; i++) 
		{x[i].style.visibility = "hidden";}
	}


/**
 * Makes all drop down form select boxes on the screen visible so they do not 
 * reappear after the dialog is closed.
 * IE has a problem with wanting select form tags to always be the 
 * topmost z-index or layer.
 */
function displaySelectBoxes() 
	{
	var x = document.getElementsByTagName("SELECT");

	for (i=0;x && i < x.length; i++)
		{x[i].style.visibility = "visible";}
	}