/*
	produced by Jan Hagge, 2006
	www.n-try.de
*/

var fadeImages = Array("left_image3.gif", "left_image2.gif", "left_image4.gif", "left_image1.gif");
var delayBetweenFades 	= 6000;				// Delay between every fade.
var actualopacity		= 100;					// Opacity in percent before js has done anything
var loaderopacity		= 100;					// Opacity in percent before js has done anything
var minopacity			= 0;					// Minimal Opacity while loading/fadeanimation
var maxopacity			= 100;					// Maximum Opacity while loading/fadeanimation (tip: take the actualopacity)
var imagePath			= "/images/gallery/";	// Path to the images that you would like to use in the gallery
var bigimgID			= "startimage";				// id="" of the big Image in the htmlsource

//DONT TOUCH THIS -v-
var loaded = false;
var fadein = false;
var interval;
var ie = document.all ? true : false;;
var nextImage;
var newimg = new Image;
var loader;
var loaderWidth;
var loadingbar;

function initSmoothImageLoader()
{	 
	if(document.getElementById(bigimgID) && fadeImages)
	{
		getNextImage();
	}
}

function initLoadingBar()
{
	loader.style.display = "block";
	loaderWidth = 0;
	ie ? loader.style.filter = "alpha(opacity="+loaderopacity+")" : loader.style.opacity = loaderopacity/100;
	loadingbar = window.setInterval("loadingBar()", 20);
}
function loadingBar()
{
	var steps = delayBetweenFades/20;
	var percent = 100/steps;
	loaderWidth = loaderWidth+percent;
	if(loaderWidth > 100)
	{
		window.clearInterval(loadingbar);
		loader.style.width = "100%";
	}
	else
	{
		loader.style.width = loaderWidth+"%";
	}	
}

function getNextImage()
{
	nextImage = fadeImages[ parseInt( Math.random() * fadeImages.length ) ];

	if( document.getElementById(bigimgID).src.search(nextImage) == -1)
	{	
		if(loader = document.getElementById("loader"))
			initLoadingBar();
			
		loadImage(imagePath+nextImage);
		window.setTimeout("showPic()", delayBetweenFades);
	}
	else
		window.setTimeout("getNextImage()", 2);
}

function showPic()
{
	if (document.getElementById)
	{	
		//stop the running interval
		if( !isNaN(interval) )
			window.clearInterval(interval);
		//start new interval	
		interval = window.setInterval("toogleFade()", 20);

		return false;
	}
	else
	{
		return true;
	}
}

function loadImage(newsrc)
{	
	newimg.src = newsrc;
}

function toogleFade()
{	
	if(actualopacity == minopacity)
	{
		loaded = newimg.complete ? true : false;
		if(loaded)
		{	
			if(loader)
				loader.style.width = "0";
			document.getElementById(bigimgID).src = newimg.src;
		}
		fadein = true;
	}
	else if(actualopacity == maxopacity)
	{
		if(loaded && fadein)
		{
			window.clearInterval(interval);
			getNextImage();
		}			
		fadein = false;
	}
		
	//set new opacity
	actualopacity = fadein ? actualopacity+2 : actualopacity-2;
	loaderopacity = fadein ? loaderopacity+3 : loaderopacity-3;
	
	aim = document.getElementById(bigimgID);
	ie ? aim.style.filter = "alpha(opacity="+actualopacity+")" : aim.style.opacity = actualopacity/100;
	if(loader)
		ie ? loader.style.filter = "alpha(opacity="+loaderopacity+")" : loader.style.opacity = loaderopacity/100;
}

function addLoadFunction(addme)
{	
	var oldonload = window.onload;
	window.onload = typeof window.onload != 'function' ? addme : function(){ oldonload(); addme(); };
}

addLoadFunction(initSmoothImageLoader);

function openBrWindow(theURL,winName,features, myWidth, myHeight, isCenter) {
if(window.screen)if(isCenter)if(isCenter=="true"){
var myLeft = (screen.width-myWidth)/2;
var myTop = (screen.height-myHeight)/2;
features+=(features!='')?',':'';
features+=',left='+myLeft+',top='+myTop;
}
window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
}