var menu_array = new Array('about_', 'curriculum_', 'information_')
item_selected = false
close_time = 0

function show_menu(name){
	clearTimeout(close_time);
	for(i=0; i<menu_array.length; i++){
		document.getElementById(menu_array[i] + 'menu').style.visibility = "hidden"
	}
	document.getElementById(name + 'menu').style.visibility = "visible"
}

function hide_menu(){
	if(item_selected == false){
		for(i=0; i<menu_array.length; i++){
			document.getElementById(menu_array[i] + 'menu').style.visibility = "hidden"
		}
	}else{
		return false
	}
}

function item_mouse_over(){
	item_selected = true
}

function item_mouse_out(){
	item_selected = false
	close_time = setTimeout("hide_menu()", 100);
}