var menuItems = new Array()
menuItems[0] = "AboutSubNav";
menuItems[1] = "DevSubNav";

function showMenuItem(menuID){
	hideMenuItems();
	var div = document.getElementById(menuID);
	div.style.display = 'block';
}
function hideMenuItems(){
	var temp;
	for(i=0;i<menuItems.length;i++){
		temp = document.getElementById(menuItems[i]);
		temp.style.display = 'none';
	}
}