// JavaScript :: mainNav

var menus = document.getElementsByTagName("img");
for(i=0;i<menus.length;i++) {
	if(menus[i].className == "menuItem") {
		menus[i].onmouseover = function() {
			imgSwap(this.id, true);
		};
		menus[i].onmouseout = function() {
			imgSwap(this.id, false);
		};
	}
}
function imgSwap(id, swap) {
	if(swap == true) {
		document.getElementById(id).src = "images/" + id + "_ro.gif";
	} else {
		document.getElementById(id).src = "images/" + id + "_btn.gif";
	}
}