var imageNames = new Array ("ah","res","cs");
function changeImages(thisOne) {
	document[thisOne+"_nav"].src = "/i/"+ thisOne +"_on.gif";
}
function changeBack() {
	for(i=0;i<imageNames.length;i++) {
			document[imageNames[i]+"_nav"].src = "/i/"+imageNames[i] +"_off.gif";
	}
}

// MENU_OPERATION
var timer = 'null';
function showMenu(MenuName,dist) {
	clearTimeout(timer);
	hideMenus();
	changeBack();
	changeImages(MenuName);
	document.getElementById(MenuName+"_subMenu").style.visibility = 'visible';
	document.getElementById(MenuName+"_subMenu").style.top = navHeight;
	document.getElementById(MenuName+"_subMenu").style.left = dist + "px";
	//moveIt(MenuName,windowWidth,dist);
}
function hideMenus() {
	for(i=0;i < imageNames.length;i++) {
	document.getElementById(imageNames[i]+"_subMenu").style.visibility = 'hidden';
	}
}
function OverLayer() {
	clearTimeout(timer);
}

function OutLayer() {
	clearTimeout(timer);
	timer = setTimeout("hideMenus();changeBack();",300);
}