var on = new Array();
var over = new Array();
var normal = new Array();
var images = new Array();

for(var e = 1; e < 8; e ++) {
	images[e - 1] = "menu_item_" + e;
	on[e - 1] = new Image();
	on[e - 1].src = "images/menu_" + e + "_on.gif";
	over[e - 1] = new Image();
	over[e - 1].src = "images/menu_" + e + "_over.gif";
	normal[e - 1] = new Image();
	normal[e - 1].src = "images/menu_" + e + ".gif";
}

function setMenuOver(index, state) {
	if(document.images[images[index]].src.indexOf("_on") == -1)
		document.images[images[index]].src = (state ? over[index].src : normal[index].src);
}

function setMenuOn(index) {
	document.images[images[index]].src = on[index].src;
}