var preloaded = new Array();

function setMOhandler() {
	// MouseOver for IMG
	var x = document.getElementsByTagName('img');
	for (var i=0; i < x.length; i++) {
		if (x[i].className == 'MO') {

			// Preload
			var onImageSrc = x[i].src.replace('_n.', '_o.');
			preloaded[preloaded.length] = new Image();
			preloaded[preloaded.length-1].src = onImageSrc;
			// Attach event handlers
			x[i].onmouseover = MO_over;
			x[i].onmouseout = MO_out;
		}
	}
}
function MO_over() {
	this.src = this.src.replace('_n.', '_o.');
}
function MO_out() {
	this.src = this.src.replace('_o.', '_n.');
}