function smartRollover() {
	if(document.getElementsByTagName) {
	
		// for <img src="****_out.***">
		var images = document.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute("src").match("_(out|on)\\.(png|gif|jpg|jpeg)"))
			{
				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_out.", "_over."));
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_over.", "_out."));
				}
			}
		}
		
		// for <input type=image src="****_out.***"> 
		// @since 2007-12-09
		// @author saeki
		var images2 = document.getElementsByTagName("input");
		for(var i=0; i < images2.length; i++) {
			if(images2[i].getAttribute("type").match("image") && images2[i].getAttribute("src").match("_out\\.(png|gif|jpg|jpeg)"))
			{
				images2[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_out.", "_over."));
				}
				images2[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_over.", "_out."));
				}
			}
		}
		
	}
}
if(window.addEventListener) {
	window.addEventListener("load", smartRollover, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", smartRollover);
}