function MenuOn(x){
 if(navigator.appVersion.indexOf("Mac") != -1 && navigator.appName.indexOf( "Microsoft") != -1){
  
 } else {
  obj=document.getElementById
  ("submenu"+x).style.visibility="visible";
 }
}

function MenuOff(x){
 if(navigator.appVersion.indexOf("Mac") != -1 && navigator.appName.indexOf( "Microsoft") != -1){
  
 } else {
  obj=document.getElementById
  ("submenu"+x).style.visibility="hidden";
 }
}