function switchMenu(obj) {
   var el = document.getElementById(obj);
   if ( el.style.display != "none" ) {
      el.style.display = 'none';
   }
   else {
      el.style.display = '';
   }
}


if(document.getElementsByTagName) {
var a = document.getElementsByTagName("a");
//collect all anchors A
for(var i = 0; i < a.length; i++){
// mouse onfocus, blur anchors
a[i].onfocus = function(){this.blur();};
}
}