function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		ne_over = newImage("/images/home/map/ne_over.gif");
		se_over = newImage("/images/home/map/se_over.gif");
		sc_over = newImage("/images/home/map/sc_over.gif");
		sw_over = newImage("/images/home/map/sw_over.gif");
		nw_over = newImage("/images/home/map/nw_over.gif");
		other_over = newImage("/images/home/map/other_over.gif");
		preloadFlag = true;
	}
}

function resetallmenus() {
    resetmenu("ne_menu");
    resetmenu("se_menu");
    resetmenu("nc_menu");
    resetmenu("sc_menu");
    resetmenu("sw_menu");
    resetmenu("nw_menu"); 
    resetmenu("other_menu");
}

function displaymenu(menu) {
    resetallmenus();
    document.getElementById(menu).style.visibility="visible";
}

function resetmenu(menu) {
    document.getElementById(menu).style.visibility="hidden";
}