/*
	Lightbox JS: Fullsize Image Overlays 
	by Lokesh Dhakar - http://www.huddletogether.com

	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/

	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
	(basically, do anything you want, just leave my name and link)
	
	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/
var inclusionforms = new Array();

//
// getArgs()
// Return array with arguments from a string (SPLIT)
// 
function getArgs(str)
{
	var args = new Object();
	var pairs = str.split(";");			// Break at comma.

	for(var i = 1; i < pairs.length; i++)
	{
		var pos = pairs[i].indexOf('=');	// Look for "name=value".

		if (pos == -1) continue;		// If not found, skip.

		var argname = pairs[i].substring(0,pos);// Extract the name.
		var value = pairs[i].substring(pos+1);	// Extract the value.
		args[argname] = unescape(value);	// Store as a property.
   	}

   	return args;					// Return the object.
}


//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}



//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}


//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
//
function pause(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//

function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	
	if(key == 'x'){ hideLightbox(); }
}


//
// listenKey()
//
function listenKey () {	document.onkeypress = getKey; }
	

//
// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showLightbox(objLink, globaltop, globalleft, globalwidth, globalheight, event)
{
	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	objOverlay.onclick = function () {hideLightbox(); return false;}
	objOverlay.oncontextmenu = function () {return false;}
	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

// if from modal code
	if(objLightbox)
	{
	 	if(xmlhttp)
	 	{
	 	 	var response = false;
			doRequest(xmlhttp, "GET", objLink.href, false, null, null);
//alert(xmlhttp.status);
			if (xmlhttp.status == 200)
			{
//alert('2');
	         	response = xmlhttp.responseText;
			}
	
			//alert(response);
		 	var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 75 - (arrayPageSize[3]/2)) / 2);
			var lightboxLeft = ((arrayPageSize[0] - 20 - (arrayPageSize[0]/2)) / 2);
					
			objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
			objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
		 	if (globaltop)
			{
//				alert(globaltop);
				if(globaltop == 'mpos')
				{
					var posy=100;
					if(document.all)
					{
						posy=window.event.y;
					}
					else
					{
						posy=event.pageY;
					}
					objLightbox.style.top = posy+"px";
				}
				else
				{
		 	 		objLightbox.style.top = globaltop+"px";
				}
			}
		 	if (globalleft)
			{
//				alert(globalleft);
				if(globalleft == 'mpos')
				{
					var posx=100;
					if(document.all)
					{
						posx=window.event.x;
					}
					else
					{
						posx=event.pageX;
					}
					objLightbox.style.left = posx+"px";
				}
				else
				{
		 	 		objLightbox.style.left = globalleft+"px";
				}
		 	 	
			}
		 	if (globalwidth)
		 	 	objLightbox.style.width = globalwidth+"px";
		 	if (globalheight)
		 	 	objLightbox.style.height = globalheight+"px";

			objLightbox.innerHTML = response;
				
			selects = document.getElementsByTagName("select");
		        for (i = 0; i != selects.length; i++)
			{
		         	formname = selects[i].form.name;
		         	for (j=0; j<inclusionforms.length;j++)
		         	{
		         	 	if (formname == inclusionforms[j])
				            selects[i].style.visibility = "hidden";
				    }
		        }
		        
		        objLightbox.style.display = 'block';
	 	}
	}
}

	function positionLightbox(ele, typex, typey) // (htmlelement reference)ele, (string) typex = 0, center or max, (string) typey = 0, center or max
	{
		typex = typex||'0';
		typey = typey||'0';
	
		var dim = windowDim();
		var width = ele.offsetWidth;
		var height = ele.offsetHeight;
		
		var posx = parseInt((dim[0]/2) - (width/2));
		var posy = parseInt((dim[1]/2) - (height/2));
		var maxx = parseInt(dim[0] - width);
		var maxy = parseInt(dim[1] - height);
		
//		alert(dim);
//		alert([width, height]);
//		alert([posx, posy, maxx, maxy]);
		if(typey == '0')
			ele.style.top = '0px';
		if(typex == '0')
			ele.style.top = '0px';
			
		if(typey == 'center')
			ele.style.top = posy+'px';
		if(typex == 'center')
			ele.style.left = posx+'px';
			
		if(typey == 'max')
			ele.style.top = maxy+'px';
		if(typex == 'max')
			ele.style.left = maxx+'px';
			
		if(isNum(typey))
			ele.style.top = typey+'px';
		if(isNum(typex))
			ele.style.left = typex+'px';
	}
	
	function isNum(n)
	{
		return !isNaN(parseFloat(n)) && isFinite(n);
	}
		
	function windowDim()
	{
		var clientWidth = 0, clientHeight = 0;
		if( typeof( window.innerWidth ) == 'number' )
		{
			//Non-IE
			clientWidth = window.innerWidth;
			clientHeight = window.innerHeight;
		}
		else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) )
		{
			//IE 6+ in 'standards compliant mode'
			clientWidth = document.documentElement.clientWidth;
			clientHeight = document.documentElement.clientHeight;
		}
		else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) )
		{
			//IE 4 compatible
			clientWidth = document.body.clientWidth;
			clientHeight = document.body.clientHeight;
		}
		
		return [clientWidth, clientHeight];
	}
	
//
// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showLightbox2(objLink, rel, event)
{
	var args = getArgs(rel);
	var globaltop = args['t'];
	var globalleft = args['l'];
	var globalwidth = args['w'];
	var globalheight = args['h'];
	var topdeviation = args['td'] || 0;

	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	objOverlay.onclick = function () {hideLightbox(); return false;}
	objOverlay.oncontextmenu = function () {return false;}
	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

// if from modal code
	if(objLightbox)
	{
	 	if(xmlhttp)
	 	{
	 	 	var response = false;
			doRequest(xmlhttp, "GET", objLink.href, false, null, null);
//alert(xmlhttp.status);
			if (xmlhttp.status == 200)
			{
//alert('2');
	         	response = xmlhttp.responseText;
			}
	
			objLightbox.style.width = "600px";
			objLightbox.style.height = "600px";
			objLightbox.style.display = 'block';
	//		objLightbox.style.backgroundColor = '#eee';
			objLightbox.innerHTML = response;

			positionLightbox(objLightbox, 'center', 'center');
			
			selects = document.getElementsByTagName("select");
		        for (i = 0; i != selects.length; i++)
			{
		         	formname = selects[i].form.name;
		         	for (j=0; j<inclusionforms.length;j++)
		         	{
		         	 	if (formname == inclusionforms[j])
				            selects[i].style.visibility = "hidden";
				    }
		        }
		        
	 	}
	}
}


//
// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showModal(objLink, globaltop, globalleft, globalwidth, globalheight)
{
	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	objOverlay.onclick = function () {return false;}
	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

	if(objLightbox)
	{
	 	if(xmlhttp)
	 	{
	 	 	var response = false;
			doRequest(xmlhttp, "GET", objLink.href, false, null, null);
			if (xmlhttp.status == 200)
			{
	         	response = xmlhttp.responseText;
			}
	
			//alert(response);
		 	var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - (arrayPageSize[3]/2)) / 2);
			var lightboxLeft = ((arrayPageSize[0] - 20 - (arrayPageSize[0]/2)) / 2);
				
			objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
			objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
		 	if (globaltop)
		 	 	objLightbox.style.top = globaltop+"px";
		 	if (globalleft)
		 	 	objLightbox.style.left = globalleft+"px";
		 	if (globalwidth)
		 	 	objLightbox.style.width = globalwidth+"px";
		 	if (globalheight)
		 	 	objLightbox.style.height = globalheight+"px";

			objLightbox.style.width = "600px";
			objLightbox.style.height = "600px";
			objLightbox.style.display = 'block';
								  			 	
			objLightbox.innerHTML = response;
			
			positionLightbox(objLightbox, 'center', 'center');
				
			selects = document.getElementsByTagName("select");
		        for (i = 0; i != selects.length; i++)
			{
		         	formname = selects[i].form.name;
		         	for (j=0; j<inclusionforms.length;j++)
		         	{
		         	 	if (formname == inclusionforms[j])
				            selects[i].style.visibility = "hidden";
				    }
		        }
		        
		        objLightbox.style.display = 'block';
	 	}
	}
}

//
// hideLightbox()
//
function hideLightbox()
{
	// get objects
	objOverlay = document.getElementById('overlay');
	objLightbox = document.getElementById('lightbox');

	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';
	//objLightbox.innerHTML = '';

	// make select boxes visible
	selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}

	// disable keypress listener
	document.onkeypress = '';
}




//
// initLightbox()
// Function runs on window load, going through link tags looking for rel="lightbox".
// These links receive onclick events that enable the lightbox display for their targets.
// The function also inserts html markup at the top of the page which will be used as a
// container for the overlay pattern and the inline image.
//
function initLightbox(refreshanchorsonly)
{
//alert('1');	
	if (!document.getElementsByTagName){ return; }
	
	var anchors = document.getElementsByTagName("a");

	// loop through all anchor tags
	for (var i=0; i<anchors.length; i++){
		var anchor = anchors[i];
//alert('2');
//		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){
//			anchor.onclick = function () {showLightbox(this, false, false, false, false); return false;}
//		}

		var rel = anchor.getAttribute("rel");
		if (rel)
		{
//alert('12');
			if (anchor.getAttribute("href") && (rel.search(/lightbox/) != -1)){
//alert('a');
			 	var args = getArgs(rel);
			 	//anchor.onclick = function (e) {showLightbox(this, args['t'], args['l'], args['w'], args['h'],e); return false;}
				anchor.onclick = function (e) {showLightbox2(this, this.getAttribute("rel"), e); return false;}
			}
			if (anchor.getAttribute("href") && (rel.search(/modal/) != -1)){
//alert('b');
			 	var args = getArgs(rel);
			 	anchor.onclick = function () {showModal(this, args['t'], args['l'], args['w'], args['h']); return false;}
			}
		}

		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "modal")){
			anchor.onclick = function () {showModal(this, false, false, false, false); return false;}
		}
	}

	// the rest of this code inserts html at the top of the page that looks like this:
	//
	// <div id="overlay">
	//		<a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>
	//	</div>
	// <div id="lightbox">
	//		<a href="#" onclick="hideLightbox(); return false;" title="Click anywhere to close image">
	//			<img id="closeButton" />		
	//			<img id="lightboxImage" />
	//		</a>
	//		<div id="lightboxDetails">
	//			<div id="lightboxCaption"></div>
	//			<div id="keyboardMsg"></div>
	//		</div>
	// </div>
	
	if(refreshanchorsonly != true)
	{
	 //	alert("init");
		var objBody = document.getElementsByTagName("body").item(0);
		
		// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
		var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','overlay');
		objOverlay.onclick = function () {hideLightbox(); return false;}
		objOverlay.style.display = 'none';
		objOverlay.style.position = 'absolute';
		objOverlay.style.top = '0';
		objOverlay.style.left = '0';
		objOverlay.style.zIndex = '90';
	 	objOverlay.style.width = '100%';
		objBody.insertBefore(objOverlay, objBody.firstChild);
		
		var arrayPageSize = getPageSize();
		var arrayPageScroll = getPageScroll();
	
		// create lightbox div, same note about styles as above
		var objLightbox = document.createElement("div");
		objLightbox.setAttribute('id','lightbox');
		objLightbox.style.display = 'none';
		objLightbox.style.position = 'absolute';
		objLightbox.style.zIndex = '100';	
		objBody.insertBefore(objLightbox, objOverlay.nextSibling);
	}
}



//
// addLoadEvent()
// Adds event to window.onload without overwriting currently assigned onload functions.
// Function found at Simon Willison's weblog - http://simon.incutio.com/
//
function addLoadEvent(func)
{	
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
    	window.onload = func;
	} else {
		window.onload = function(){
		oldonload();
		func();
		}
	}

}



addLoadEvent(initLightbox);	// run initLightbox onLoad