(function(onLoad) {
		try {
				window.addEventListener('load', onLoad, false);
		} catch (e) {
				window.attachEvent('onload', onLoad);
		}
})(function() {
		var over = function() { this.src = this.src.replace('_off.', '_on.'); };
		var out	= function() { this.src = this.src.replace('_on.', '_off.'); };
		var img = document.getElementsByTagName('img');
		for (var i = 0, l = img.length; i < l; i++) {
				if (!img[i].src.match(/_off\./)) continue;
				img[i].onmouseover = over;
				img[i].onmouseout	= out;
		}
});