/*****

Image Cross Fade Redux
Version 1.0
Last revision: 02.15.2006
steve@slayeroffice.com

Please leave this notice intact. 

Rewrite of old code found here: http://slayeroffice.com/code/imageCrossFade/index.html


*****/


window.addEventListener?window.addEventListener("load",so_init,false):window.attachEvent("onload",so_init);

var d=document, imgs = new Array(), zInterval = null, current=0, pause=false;

function so_init() {
	if(!d.getElementById || !d.createElement)return;

	// DON'T FORGET TO GRAB THIS FILE AND PLACE IT ON YOUR SERVER IN THE SAME DIRECTORY AS THE JAVASCRIPT!
	// http://slayeroffice.com/code/imageCrossFade/xfade2.css
	css = d.createElement("link");
	css.setAttribute("href","xfade2.css");
	css.setAttribute("rel","stylesheet");
	css.setAttribute("type","text/css");
	d.getElementsByTagName("head")[0].appendChild(css);

	imgs = d.getElementById("imageContainer").getElementsByTagName("img");
	for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
	imgs[0].style.display = "block";
	imgs[0].xOpacity = .99;
	
	setTimeout(so_xfade,2000);

}

function so_xfade() {
	cOpacity = imgs[current].xOpacity;
	var filename = imgs[current].src
	var SubstringOfFilename = filename.substring(filename.length, filename.length-5)
	
	if(SubstringOfFilename == '0.jpg'){
	document.getElementById('menuleftContainer').style.visibility = 'visible'
	document.getElementById('schoolLogo').style.visibility = 'visible'
	} 
	if(SubstringOfFilename == '7.jpg'){
	nIndex = imgs[current+1]?current+2:1;
	
	} else {
	nIndex = imgs[current+1]?current+1:0;
}
	nOpacity = imgs[nIndex].xOpacity;
	
	cOpacity-=.05; 
	nOpacity+=.05;
	
	imgs[nIndex].style.display = "block";
	imgs[current].xOpacity = cOpacity;
	imgs[nIndex].xOpacity = nOpacity;
	
	setOpacity(imgs[current]); 
	setOpacity(imgs[nIndex]);
	
	if(cOpacity<=0) {
		imgs[current].style.display = "none";
		current = nIndex;
		setTimeout(so_xfade,2000);
	} else {
		setTimeout(so_xfade,5);
	}
	
	function setOpacity(obj) {
		if(obj.xOpacity>.99) {
			obj.xOpacity = .99;
			return;
		}
		obj.style.opacity = obj.xOpacity;
		obj.style.MozOpacity = obj.xOpacity;
		obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
	}
}

// tilpasse billederne til størrelsen på brugerens skærm
function resize_img(){ 	
	var d=document, imgs = new Array(), zInterval = null, current=0, pause=false;
	imgs = d.getElementById("imageContainer").getElementsByTagName("img");
	for(i=0;i<imgs.length;i++) {

		imgs[i].width =document.body.clientWidth
		//document.getElementById(id).width =document.body.clientWidth
		// 1,6 er forholdet mellem højden og bredden på billede
		if(document.body.clientWidth/document.body.clientHeight < 1.6){
			imgs[i].height =document.body.clientHeight
			//document.getElementById(id).height =document.body.clientHeight
		} 
		else {
			//document.getElementById(id).height=document.body.clientWidth/1.6
			imgs[i].height =document.body.clientWidth/1.6
		}
	}
}