function jump() {
	aaa=document.menu
			.submenu.selectedIndex;
	bbb=document.menu.submenu
			.options[aaa].value;
	window.location.href=bbb;
	}


function show() {
	document.getElementById("submenu1")
			.style.visibility="visible";
	}
function shut() {
	document.getElementById("submenu1")
			.style.visibility="hidden";
	}

function show2() {
	document.getElementById("submenu2")
			.style.visibility="visible";
	}
function shut2() {
	document.getElementById("submenu2")
			.style.visibility="hidden";
	}
function show3() {
	document.getElementById("submenu3")
			.style.visibility="visible";
	}
function shut3() {
	document.getElementById("submenu3")
			.style.visibility="hidden";
	}
	function show4() {
	document.getElementById("submenu4")
			.style.visibility="visible";
	}
function shut4() {
	document.getElementById("submenu4")
			.style.visibility="hidden";
	}