function setRollOver() {
	if (!document.getElementsByTagName) return false;
	var images = document.getElementsByTagName('img');
	for (var i = 0; i < images.length; i++) {
		if (images[i].src.match(/_off\./i)) {
			setRollOverImage(images[i]);
		}
	}
	var inputs = document.getElementsByTagName('input');
	for (i = 0; i < inputs.length; i++) {
		if ((inputs[i].type == 'image') && (inputs[i].src.match(/_off\./i))) {
			setRollOverImage(inputs[i]);
		}
	}
	return true;
}
function setRollOverImage(obj) {
	obj.onmouseover = function() {
		this.src = this.src.replace(/_off\./i, '_over.');
	}
	obj.onmouseout = function() {
		this.src = this.src.replace(/_over\./i, '_off.');
	}
	if (navigator.userAgent.indexOf('MSIE') < 0) obj.onmouseup = function() {
		this.src = this.src.replace(/_over\./i, '_off.');
	}
}
if (window.addEventListener) window.addEventListener('load', setRollOver, false);
if (window.attachEvent) window.attachEvent('onload', setRollOver);