function smartRollover() {
	if(document.getElementsByTagName) {
		var images = document.getElementsByTagName("img");
		var class_str = "";
		
		if (typeof document.documentElement.style.maxHeight != "undefined") {
			if (typeof document.documentElement.style.msInterpolationMode != "undefined") {
				
				if (document.querySelectorAll) {
					// IE8
					class_str = "class";
				} else {
					// IE7
					class_str = "classname";
				}
				
			} else {
				// ETC
				class_str = "class";
			}

		} else {
			// IE6
			class_str = "classname";
		}

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute(class_str) != "noover") {
				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."));
					}
				}
			}
		}
	}
}

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