function smartRollover() {
	if(document.getElementsByTagName) {
		var images = document.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			//(Z9 2011/06/03)>>
			if(images[i].getAttribute("src")){
			//<<(Z9 2011/06/03)
				if(images[i].getAttribute("src").match("_off."))
				{
					images[i].onmouseover = function() {
						this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
					}
					images[i].onmouseout = function() {
						this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
					}
				}
			//(Z9 2011/06/03)>>
			}
			//<<(Z9 2011/06/03)
		}
	}
}

if(window.addEventListener) {
	window.addEventListener("load", smartRollover, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", smartRollover);
}