function setvisible(id,level,count,subcount)
{
all=50;
for (i=0;i<all; i++)
 {
   s=document.getElementById('level'+count+'menu'+level+'submenu'+subcount+'item'+i);
   if (s)
   {
      if (i==id)
       {
         if (s.style.display == 'block') s.style.display='none';
            else s.style.display='block';
       }
       else s.style.display='none';
   }
 }
}