if(navigator.userAgent.indexOf("MSIE") != -1) {
	var ie = true;
}

function rollOver(trriger) {
	var imgsrc = trriger.getAttribute('src');
	trriger.setAttribute('src', imgsrc.replace('_out.', '_ovr.'));
	trriger.onmouseout = function() {
		trriger.setAttribute('src', imgsrc);
	}
}
function setRollOver(trriger) {
	if(ie) {
		trriger.attachEvent('onmouseover', func = function(){rollOver(trriger)});
	} else {
		trriger.addEventListener('mouseover', func = function(){rollOver(trriger)}, false);
	}
}
function getROTriggers() {
	var imgCollection = document.getElementById('wrapper').getElementsByTagName('img');
	for(i=0; i < imgCollection.length; i++) {
		if((imgCollection[i].getAttribute('class') || imgCollection[i].getAttribute('className')) == 'RO') {
		var trriger = imgCollection[i];
		setRollOver(trriger);
		}
	}
}

window.onload = function() {
	getROTriggers();
}