// JavaScript Document
function init(){
	var myimages=new Array()
	for (i=0;i<init.arguments.length;i++){
		myimages[i]=new Image()
		myimages[i].src=init.arguments[i]
	}
}

function roll (what) {
var source = document.getElementById(what).src
var pos1 = source.lastIndexOf('/');
var imagePath = source.substring(0,pos1+1);
var imageSrc = source.substring(pos1+1);
var pos2 = imageSrc.lastIndexOf('_'); 
var pos3 = imageSrc.lastIndexOf('.'); 


if (pos2 == -1) {
	var image = imageSrc.substring(0,pos3);
	var ext = imageSrc.substring(pos3+1);
	document.getElementById(what).src = imagePath + image + "_over." + ext
}else{
	var image = imageSrc.substring(0,pos2);
	var ext = imageSrc.substring(pos3+1);
	document.getElementById(what).src = imagePath + image + "." + ext
}
}