var menu = new Array;
menu[0] = "menuDown1";
menu[1] = "menuDown2";
menu[2] = "menuDown3";
menu[3] = "menuDown4";
menu[4] = "menuDown5";
menu[5] = "menuDown6";
function showMenu(n){
	var obj = eval(menu[n]);
	
	if(obj.style.visibility=="visible") return;

	obj.style.visibility="visible";

	for (i=0;i<6;i++){
		mObj = eval(menu[i]);
		if (i!=n) mObj.style.visibility="hidden";
}}

function hideMenu(n) {
	var obj = eval(menu[n]);
	obj.style.visibility="hidden";

}