// JavaScript Document
overSuffix = "-over";
imageExt = ".gif";

doButtonOut = function() {
	var oldSrc = this.src;
	
	var lastNdx = oldSrc.lastIndexOf(".");
	var string1 = oldSrc.substr(0, lastNdx);
	var string2 = oldSrc.substr(lastNdx);
	
	string1 = string1.replace(overSuffix, "");
	
	var newSrc = string1 + string2;
	
	this.src = newSrc;

}

doButtonOver = function() {
	var oldSrc = this.src;
	
	var lastNdx = oldSrc.lastIndexOf(".");
	var string1 = oldSrc.substr(0, lastNdx);
	var string2 = oldSrc.substr(lastNdx);
	
	var newSrc = string1 + overSuffix + string2;
	
	this.src = newSrc;

}

initDocument = function() {
	items = YAHOO.util.Dom.getElementsByClassName("rollover");
	
	YAHOO.util.Event.addListener(items, 'mouseover', doButtonOver);
	YAHOO.util.Event.addListener(items, 'mouseout', doButtonOut);
}
	
YAHOO.util.Event.addListener(window, 'load', initDocument);