var activeMenu = -1;

function showMenu(i){
	if (i == activeMenu){
		document.getElementById("submenu_" + activeMenu).style.display = "none";
		activeMenu = -1;
		return;
	}
	if(activeMenu>=0){
		document.getElementById("submenu_" + activeMenu).style.display = "none";
	}
	document.getElementById("submenu_" + i).style.display = "block";
	document.getElementById("submenu_" + i).style.padding = "0px";
	activeMenu = i;
	preload(i, 0);
}
function showFirst() {
	showMenu(0);
}