(function(){
	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.'))
				{
					var img  = new Image();
					img.src = images[i].getAttribute('src').replace('_off.', '_on.');
					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.'));
					}
				}
			}
		}
	}
	
	//Add OnLoad Event
	if(window.addEventListener){
		window.addEventListener('load', smartRollover, false);
	}else if(window.attachEvent){
		window.attachEvent('onload', smartRollover);
	}
})();