// Roll over docuemnt

window.onload = rolloverInit;

function rolloverInit() {
	for (var i=0; i<document.images.length; i++){
		if (document.images[i].parentNode.tagName == "A") {
			setupRollover(document.images[i]);
		}
	}
}

function setupRollover(thisImage){
	thisImage.outImage = new Image();
	thisImage.outImage.src = thisImage.src;
	thisImage.onmouseout = rollOut;
	
	thisImage.overImage = new Image();
	thisImage.overImage.src = "images/"+thisImage.id+"_on.jpg";
	thisImage.onmouseover = rollOver;
}

function rollOver(){
	this.src=this.overImage.src;
}

function rollOut(){
	this.src=this.outImage.src;
}