function rollover() {
	var isIE      = navigator.appName.search(/Microsoft Internet Explorer/);
	var controles = $$('controles');
	var images    = controles.getElementsByTagName('img');
	var img = "";
	for(i=0; i<images.length; i++) {
		img = images[i].src.substring(images[i].src.lastIndexOf('/')+1, images[i].src.lastIndexOf('.'));
		if(isIE == -1) {
			images[i].setAttribute("onmouseover", "this.src='/images/design/"+img+"_hover.png'");
			images[i].setAttribute("onmouseout", "this.src='/images/design/"+img+".png'");
		}
		else {
			images[i].onmouseover = function() {RolloverGo(this)};
			images[i].onmouseout  = function() {RolloverGo(this)};
		}
	}
}
function RolloverGo(elem) {
	img = elem.src.substring(elem.src.lastIndexOf('/')+1, elem.src.lastIndexOf('.'));
	if(img.search(/hover/) != -1) {
		img = img.substring(0, img.lastIndexOf('_'));
		elem.src = '/images/design/'+img+'.png';
	}
	else elem.src = '/images/design/'+img+'_hover.png';
}