/*
	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)
*/

var loadingImage = "WEB-INF/pages/images/loading.gif";

function getPageScroll()
{
	var yScroll;
	
	if(self.pageYOffset)
	{
		yScroll = self.pageYOffset;
	}
	else if(document.documentElement && document.documentElement.scrollTop)
	{
		yScroll = document.documentElement.scrollTop;
	}
	else if(document.body)
	{
		yScroll = document.body.scrollTop;
	}
	
	arrayPageScroll = new Array('', yScroll) 
	return arrayPageScroll;
}

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)
	{
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	}
	else
	{
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	
	if(self.innerHeight)
	{
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	}
	else if(document.documentElement && document.documentElement.clientHeight)
	{
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	}
	else if(document.body)
	{
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}
	
	if(yScroll < windowHeight)
	{
		pageHeight = windowHeight;
	}
	else
	{ 
		pageHeight = yScroll;
	}
	
	if(xScroll < windowWidth)
	{
		pageWidth = windowWidth;
	}
	else
	{
		pageWidth = xScroll;
	}
	
	arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight) 
	return arrayPageSize;
}

function pause(numberMillis)
{
	var now      = new Date();
	var exitTime = now.getTime() + numberMillis;
	
	while(true)
	{
		now = new Date();
		
		if(now.getTime() > exitTime)
		{
			return;
		}
	}
}

function showLightbox()
{
	var objOverlay      = document.getElementById('overlay');
	var objLightbox     = document.getElementById('lightbox');
	var objLoadingImage = document.getElementById('loadingImage');
	var arrayPageSize   = getPageSize();
	var arrayPageScroll = getPageScroll();
	
	if(objLoadingImage)
	{
		objLoadingImage.style.top     = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
		objLoadingImage.style.left    = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
		objLoadingImage.style.display = 'block';
	}
	
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';
	
	imgPreload = new Image();

	imgPreload.onload=function()
	{
		var lightboxTop                = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
		var lightboxLeft               = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);
		objLightbox.style.top          = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left         = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
		objLightboxDetails.style.width = imgPreload.width + 'px';
		
		if(navigator.appVersion.indexOf("MSIE")!=-1)
		{
			pause(250);
		}
		
		if(objLoadingImage)
		{
			objLoadingImage.style.display = 'none';
		}

		selects = document.getElementsByTagName("select");
		
        for(i = 0; i != selects.length; i++)
        {
			selects[i].style.visibility = "hidden";
        }
		
		objLightbox.style.display = 'block';
		arrayPageSize             = getPageSize();
		objOverlay.style.height   = (arrayPageSize[1] + 'px');
		
		return false;
	}
}

function hideLightbox()
{
	objOverlay  = document.getElementById('overlay');
	objLightbox = document.getElementById('lightbox');
	
	objOverlay.style.display  = 'none';
	objLightbox.style.display = 'none';
	
	selects = document.getElementsByTagName("select");
	
    for(i = 0; i != selects.length; i++)
    {
		selects[i].style.visibility = "visible";
	}
}

function addLoadEvent(func)
{	
	var oldonload = window.onload;
	
	if(typeof window.onload != 'function')
	{
    	window.onload = func;
	}
	else
	{
		window.onload = function()
		{
			oldonload();
			func();
		}
	}
}