// JavaScript Document
function rollover(){
	var images = document.getElementsByClassName("over");
	for(var i = 0; i < images.length; i++){
		if(images[i].nodeName == "IMG"){
			Event.observe(images[i], "mouseover", imageOver, false);
			Event.observe(images[i], "mouseout", imageOut, false);
		}
	}
}

function imageOver(e){
	var element = Event.element(e);
	var path = element.src;
	element.src = path.replace(/^(.+)(\.[a-z]+)$/,"$1_o$2");
}

function imageOut(e){
	var element = Event.element(e);
	var path = element.src;
	element.src = path.replace(/^(.+)_o(\.[a-z]+)$/,"$1$2");
}