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."));

				}

			}

		}

		var inputs = document.getElementsByTagName("input");



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

if ( inputs[i].getAttribute("type" ) == 'image' )
{
			if(inputs[i].getAttribute("src").match("_off."))

			{

				inputs[i].onmouseover = function() {

					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));

				}

				inputs[i].onmouseout = function() {

					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));

				}

			}
}

		}

	}

}

window.onload = smartRollover;