var timer;
var opa;

function storbild(bild, bredd, hojd)
{
	
	document.getElementById("main").style.visibility = "hidden";
	
	document.getElementById("centerimage").style.opacity = 0;
	document.getElementById('centerimage').style.filter = "alpha(opacity=0)";
	document.getElementById("centerimage").style.width = bredd + "px";
	document.getElementById("centerimage").style.height = hojd + "px";
	document.getElementById("centerimage").style.top = "50%";
	document.getElementById("centerimage").style.marginTop = "-" + (hojd/2) + "px";
	document.getElementById("centerimage").style.left = "50%";
	document.getElementById("centerimage").style.marginLeft = "-" + (bredd/2) + "px";

	bildkod = "<a href='#'><img src='" + bild + "' onClick='javascript:tillbaka()'></a>";
	document.getElementById("centerimage").innerHTML = bildkod;

	document.getElementById("tillbaka").style.top = "50%";
	document.getElementById("tillbaka").style.marginTop = (hojd/2+5) + "px";
	document.getElementById("tillbaka").style.left = "50%";
	document.getElementById("tillbaka").style.marginLeft = "-100px";
	
	document.getElementById("centerimage").style.visibility = "visible";
	document.getElementById("tillbaka").style.visibility = "visible";

	opa = 0;	
	timer = setInterval("document.getElementById('centerimage').style.opacity = opa; document.getElementById('centerimage').style.filter = 'alpha(opacity=' + opa*100 + ')'; opa += 0.1; if(opa>=1){clearInterval(timer);}", 100);
}

function tillbaka()
{
	document.getElementById("centerimage").style.visibility = "hidden";
	document.getElementById("tillbaka").style.visibility = "hidden";

	document.getElementById("main").style.visibility = "visible";
	clearInterval(timer);
	opa = 0;
	
}