var preloadCtl = false;
var ims = new Array();

function nImg(isrc) {
	var i = new Image();
	i.src = isrc;
	return i;
}

function preloadIms() {
	for(var x=0; x<=5; x++) {

		var isrc0 = '/gfx/mu' + x + '.gif';
		var isrc1 = '/gfx/mu' + x + '_r.gif';

		ims[x] = new Array(2);

		ims[x][0] = nImg(isrc0);
		ims[x][1] = nImg(isrc1);
	}

	preloadCtl = true;
}

function ro(n, a) {
	if(preloadCtl) {
		var imgNo = parseInt(n.name.substring(2,3));
		n.src = ims[imgNo][a].src;
	}
	return true;
}