function validate(frm) 
  {   //
      // Check the email field to see if any characters were entered
      //
      if (frm.email.value.length == 0)
      {
          alert("Please enter an email address.");
          frm.email.focus();
          return false;
      }
      //
      // Now check the email field for the "@" symbol
      //
      if (frm.email.value.indexOf("@") == -1)
      {
          alert("Please enter a valid email address.");
          frm.email.focus();
          return false;
      }
  }