/**
 * COMMON DHTML FUNCTIONS
 * These are handy functions I use all the time.
 *
 * By Seth Banks (webmaster at subimage dot com)
 * http://www.subimage.com/
 *
 * Up to date code can be found at http://www.subimage.com/dhtml/
 *
 * This code is free for you to use anywhere, just keep this comment block.
 */

/**
 * X-browser event handler attachment and detachment
 * TH: Switched first true to false per http://www.onlinetools.org/articles/unobtrusivejavascript/chapter4.html
 *
 * @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");
  }
}

/**
 * Code below taken from - http://www.evolt.org/article/document_body_doctype_switching_and_more/17/30655/
 *
 * Modified 4/22/04 to work with Opera/Moz (by webmaster at subimage dot com)
 *
 * Gets the full width/height because it's different for most browsers.
 */
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 getWidthPercentage(perc)
{
  var v = getViewportWidth();
  return (v * perc);
}

function getHeightPercentage(perc)
{
  var v = getViewportHeight();
  return (v * perc);
}

/**
 * Gets the real scroll top
 */
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;
	}
}

/* -------------------------------------------------------------------------- */

// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;
var gDefaultPage = "";
var gHideSelects = false;
var gReturnVal = null;
var gReload = false;
var gOrigParams;
var gShowPrompt = false;
var gIsMaximised = false;

var gTabIndexes = new Array();
// Pre-defined list of tags we want to disable/enable tabbing into
var gTabbableTags = new Array("A","BUTTON","TEXTAREA","INPUT","IFRAME");	

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


/**
 * Initializes popup code on load.	
 */
function initPopUp() {
	// 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.innerHTML = '' +
		'<div id="popupInner">' +
			'<div id="popupTitleBar">' +
				'<div id="popupTitle"></div>' +
				'<div id="popupControls">' +
					//'<img src="close.gif" onclick="hidePopWin(false);" id="popCloseBox" title="Close" />' +
					'<span onclick="hidePopWin(false);" id="popCloseBox" title="Close">&nbsp;</span>' + 
					'<span onclick="maximiseWin();" id="popMaximiseBox" title="Maximise">&nbsp;</span>' + 
					'<span onclick="restoreWin();" id="popRestoreBox" title="Restore">&nbsp;</span>' + 
				'</div>' +
			'</div>' +
			'<iframe src="'+ gDefaultPage +'" style="width:100%;height:100%;background-color:transparent;" scrolling="auto" frameborder="0" allowtransparency="true" id="popupFrame" name="popupFrame" width="100%" height="100%"></iframe>' +
		'</div>';
	theBody.appendChild(popmask);
	theBody.appendChild(popcont);
	
	gPopupMask = document.getElementById("popupMask");
	gPopupContainer = document.getElementById("popupContainer");
	gPopFrame = document.getElementById("popupFrame");	
	
	// check to see if this is IE version 6 or lower. hide select boxes if so
	// maybe they'll fix this in version 7?
	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;
			  var showClose = false;
			  var title = '';
			  var func = null;
  										
			  params = this.className.split('-');
			  
			  
			  if (params.length == 3) // submodal-width-height
			  {
				  width = parseInt(params[1]);
				  height = parseInt(params[2]);
			  }
			  if (params.length == 4) // submodal-width-height-(show close button [true|false])
			  {
				  width = parseInt(params[1]);
				  height = parseInt(params[2]);
				  showClose = eval(params[3]);
			  }				
			  if (params.length == 5) // submodal-width-height-(show close button [true|false])-title
			  {
				  width = parseInt(params[1]);
				  height = parseInt(params[2]);
				  showClose = eval(params[3]);
				  title = params[4];
			  }			
			  if (params.length == 6) // submodal-width-height-(show close button [true|false])-title
			  {
				  width = parseInt(params[1]);
				  height = parseInt(params[2]);
				  showClose = eval(params[3]);
				  title = params[4];
				  gReload = eval(params[5]); // reload the parent page
			  }
			  if (params.length == 7) // submodal-width-height-(show close button [true|false])-title-(reload parent on close [true|false])-showprompt [true|false]
			  {
				  width = parseInt(params[1]);
				  height = parseInt(params[2]);
				  showClose = eval(params[3]);
				  title = params[4]
				  gReload = eval(params[5]); // reload the parent page
				  gShowPrompt = eval(params[6]); // show close confirm prompt
			  }
			  if (params.length == 8) // submodal-width-height-(show close button [true|false])-title-(reload parent on close [true|false])-showprompt [true|false]-callback
			  {
				  width = parseInt(params[1]);
				  height = parseInt(params[2]);
				  showClose = eval(params[3]);
				  title = params[4]
				  gReload = eval(params[5]); // reload the parent page
				  gShowPrompt = eval(params[6]);
				  func = eval(params[7]);
			  }
			    			
			  showPopWin(this.href, width, height, func, showClose, title); 
			  
			  // add a cookie so the parent can do an easy test to see if its showing or not
			  createCookie('submodal', true); 
			  
			  return false;
			}			
		}		
	}
}
addEvent(window, "load", initPopUp);

function maximiseWin()
{	
  if(gIsMaximised == true) { return; }
 
  gIsMaximised = true;
	gOrigParams = new Array(gPopupContainer.style.width, 
	                        gPopupContainer.style.height, 
	                        gPopupContainer.style.left, 
	                        gPopupContainer.style.top, 
	                        gPopFrame.style.width, 
	                        gPopFrame.style.height);

	var w = getViewportWidth();
	var h = getViewportHeight();
	
	gPopupContainer = document.getElementById("popupContainer");
	gPopupContainer.style.width = (w - 50) + 'px';
	gPopupContainer.style.height = (h - 50) + 'px';
	gPopupContainer.style.left = '20px';
	gPopupContainer.style.top = '20px';	
	
	gPopFrame.style.width = gPopupContainer.style.width;
	gPopFrame.style.height = (h - 70) + 'px';
}

function restoreWin()
{
  gIsMaximised = false;
  
	gPopupContainer = document.getElementById("popupContainer");
	gPopupContainer.style.width = gOrigParams[0];
	gPopupContainer.style.height = gOrigParams[1];
	gPopupContainer.style.left = gOrigParams[2];
	gPopupContainer.style.top = gOrigParams[3];	
	
	gPopFrame.style.width = gOrigParams[4];
	gPopFrame.style.height = gOrigParams[5];
}

/*
* Remove the cookie to say the modal popup was showing
*/
function unloadPopup()
{
  eraseCookie('submodal');
}
addEvent(window, "unload", unloadPopup);

/*
* Utility function so the parent can tell if the popup is showing or not
* we just look for the cookie that was set on init of the popup
*/
function popupIsShowing()
{
  return (readCookie('submodal') != null);
}

 /**
	* @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
	* @argument title - the title of the popup to display in the caption bar
	*/

function showPopWin(url, width, height, returnFunc, showCloseBox, title) 
{			  			  
	// 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);

	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('" + title + "');", 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 fullHeight = getViewportHeight();
		var fullWidth = getViewportWidth();
		
		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;


/**
 * Sets the size of the popup mask.
 *
 */
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) 
{
  if(gShowPrompt == true)
  {
    var retVal = confirm('Are you sure you want to close out of this popup window?\nAny changes will be lost if you have not saved them.\n\nClick OK to close this window or Cancel keep it open.');
    if(!retVal) { return; }
  }
  
	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();
	}
	
  gIsMaximised = false;
  
	if(gReload == true) 
	{
	  // dont use location.reload(true) to avoid postback data warnings from browser
	  location.href = location.href;
	}
}

/**
 * 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(title) {
  try
  {
	if (window.frames["popupFrame"].document.title == null) {
		window.setTimeout("setPopTitle(" + title + ");", 10);
	} else {
		document.getElementById("popupTitle").innerHTML = title;
	}
	}
	catch(e)
	{
	
	}
}

// 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
*
* Thanks for the code Scott!
*/
function hideSelectBoxes() {
	for(var i = 0; i < document.forms.length; i++) {
		for(var e = 0; e < document.forms[i].length; e++){
			if(document.forms[i].elements[e].tagName == "SELECT") {
				document.forms[i].elements[e].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 wanted select form tags to always be the topmost z-index or layer
*/
function displaySelectBoxes() {
	for(var i = 0; i < document.forms.length; i++) {
		for(var e = 0; e < document.forms[i].length; e++){
			if(document.forms[i].elements[e].tagName == "SELECT") {
			document.forms[i].elements[e].style.visibility="visible";
			}
		}
	}
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}