var imgs = new Array;

function AddRollover(imgID, url1, url2){
	imgs[imgID] = new Array;
	imgs[imgID][0] = new Image();
	imgs[imgID][0].src = url1;
	imgs[imgID][1] = new Image();
	imgs[imgID][1].src = url2;

	if (document.getElementById){
		var img = document.getElementById(imgID);
		img.src = imgs[imgID][0].src;
		img.onmouseover = function(e){ RollOver(imgID) };
		img.onmouseout = function(e){ RollOff(imgID) };
	}
}

function ImageFrame(imgID, frame){
	if (document.getElementById){
		var img = document.getElementById(imgID);
		if (img){
			img.src = imgs[imgID][frame].src;
		}
	}
}

function RollOver(imgID){
	ImageFrame(imgID, 1);
}
function RollOff(imgID){
	ImageFrame(imgID, 0);
}