function showSubMenu(SwitchMenu) {
//var allsubmenus =["one","two","three","four","five","six","seven","eight"];
var allsubmenus =["six","seven","eight"];
for(var i=0; i<allsubmenus.length; i++)

document.getElementById(allsubmenus[i]).style.display = 'none';
document.getElementById(SwitchMenu).style.display = 'block';

}