function toogle_menu(my_id)
 {
 var ct=document.getElementById(my_id);
 if (ct.style.display=="none") ct.style.display="block";
 else ct.style.display="none";
 }

 function show_menu(my_id)
 {
 var ct=document.getElementById(my_id);
  ct.style.display="block";


 }

 function hide_menu(my_id)
  {
  var ct=document.getElementById(my_id);
  ct.style.display="none";

 }

function preload()
{
hide_menu('cit');
};