function smartRollover() {

	if(document.getElementsByTagName) {

		var images = document.getElementsByTagName("img");


		for(var i=0; i < images.length; i++) {

			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."));

				}

			}

		}

	}

}

/*----*/

try {

	window.addEventListener('load',smartRollover , false);

} catch(e){

	window.attachEvent('onload',smartRollover);

}