window.onload = roInit;
//document.write("<H1>HELLO!</H1>");
function roInit() {
	//alert("Images Length: " + document.images.length);
	for(var i=0; i < document.images.length; i++) {
		var isButton = document.images[i].id.split("_")[0].length;
		//document.write(button);
		//document.write("<h3>" + document.images[i].parentNode.tagName + "<h3><br />");
		if(document.images[i].parentNode.tagName == "A" && isButton == 2) {
			//document.write(document.images[i].src + "<br />");
			initRO(document.images[i]);
		}
	}
}

function initRO(img) {
		
	var imgType = img.id.split("_")[0];
	//document.write(imgType + "<br />");
	
	img.upImage = new Image();
	img.upImage.src = "images/" + imgType + "/" + img.id + "_Up.gif";
	//document.write(img.upImage.scr);
	img.onmouseout = imgUp;

	img.dnImage = new Image();
	img.dnImage.src = "images/" + imgType + "/" + img.id + "_Dn.gif";
	img.onmouseover = imgDn;	
}

function imgUp() {
	this.src = this.upImage.src;
}

function imgDn() {
	this.src = this.dnImage.src;	
}