//var randomnumber = Math.floor(Math.random()*homehero.length);
var randomnumber = 0;
var timebetweentransitions = 7; // seconds
var transitionlength = .3; // seconds
var opacitystepsize = 4; // evenly divisible by 100 (percentage of opacity)

var fadeinterval = transitionlength*opacitystepsize*10;
function imagerotate() {rotateinterval = setInterval('changeImage()',timebetweentransitions*1000);}
function changeImage() {
	if (randomnumber < homehero.length-1) {newnumber = randomnumber+1} else {newnumber = 0;}
	setTimeout('fadein(0)',0);
}
function fadein(currentopacity) {
	whichimg = 'homehero'+newnumber;
	document.getElementById(whichimg).style.zIndex='5';
	document.getElementById(whichimg).style.display='block';
	if (currentopacity < 100) {
		newopacity = currentopacity+opacitystepsize;
		document.getElementById(whichimg).style.filter='alpha(opacity='+newopacity+')';
		document.getElementById(whichimg).style.MozOpacity=newopacity/100;
		document.getElementById(whichimg).style.opacity=newopacity/100;
		setTimeout('fadein(newopacity)',fadeinterval);
	} else {
		document.getElementById('homehero'+randomnumber).style.display='none';
		document.getElementById('homehero'+newnumber).style.zIndex='1';
		randomnumber = newnumber;
		clearTimeout();
	}
}