function submitExtra(extra)
{
var setextra = document.getElementById('setextra');
var browser = navigator.appName;
if (extra==true)
   {
   if (browser=="Microsoft Internet Explorer")
      {
      setextra.style.display = "block";
      }else
      {
      setextra.style.display = "table";	
      }
   }else
   {
   setextra.style.display = "none";
   }
}