function setVisibility(obj, sVisible, obj2, sVisible2)
{
   if ( !document.images ) 
        return; 
   if ( typeof obj == "string" ) 
       obj = document.getElementById (obj); 
    obj.style.display = sVisible; 
   if ( typeof obj2 == "string" ) 
       obj2 = document.getElementById (obj2); 
    obj2.style.display = sVisible2; 
   return false; 
}