var rotIndex = 2;
var rotImageCount = 5;
var rotStep = 10;
var rotBackground,rotDisplay,rotFadeStep;

if (!window.onload){onLoads = new Array(); window.onload = function(){for (z = 0;z < onLoads.length;z++) onLoads[z]();}}
onLoads.push(function(){
	rotBackground = document.getElementById("background");
	rotDisplay = document.getElementById("display");
	rotFinal();
	setInterval (rotUpdate,100);
});

function rotAlpha(obj,alpha){
	if (obj.filters !== undefined)
		obj.style.filter = "alpha(opacity=" + alpha + ")";
	else if (obj.style.MozOpacity !== undefined)
		obj.style.MozOpacity = alpha / 100;
	else if (obj.style.opacity !== undefined)
		obj.style.opacity = alpha / 100;
	else if (obj.style.KhtmlOpacity !== undefined)
		obj.style.KhtmlOpacity = alpha / 100;
}

function rotFinal(){
	rotFadeStep = false;
	document.body.style.backgroundImage = rotBackground.style.backgroundImage ? rotBackground.style.backgroundImage : "url(/homescreens/1.jpg)";
	rotAlpha(rotBackground,0);
	rotBackground.style.backgroundImage = "url(/homescreens/" + rotIndex + ".jpg)";
}

function rotNextImage(){
	if (rotFadeStep)
		rotFinal();
	rotStep = 10;
	rotIndex = rotIndex++ % rotImageCount + 1;
	rotFadeStep = 10;
}

function rotUpdate(){
	if (rotFadeStep !== false){
		rotAlpha(rotBackground,100 - (--rotFadeStep * 10));
		if (!rotFadeStep)
			rotFinal();
	}
	rotStep -= .1;
	if (rotStep <= 0)
		rotNextImage();
	rotDisplay.innerHTML = rotStep.toFixed(1) + " sec. resterend";
}