function checkEntries(frm)
{
   if (frm.name.value == "" || frm.name.value == null)
   {
      alert('Please enter your NAME.');
      frm.name.focus();
      frm.name.select();
      return false;
   }
   if (frm.email.value == "" || frm.email.value == null)
   {
      alert('Please enter your EMAIL ADDRESS.');
      frm.email.focus();
      frm.email.select();
      return false;
   }
   if (frm.url.value == "" || frm.url.value == null)
   {
      alert('Please enter the URL of the web page.');
      frm.url.focus();
      frm.url.select();
      return false;
   }
   if (frm.message.value == "" || frm.message.value == null)
   {
      alert('Please enter your MESSAGE.');
      frm.message.focus();
      frm.message.select();
      return false;
   }
   return true;
}