// Checks to see if email address is 'valid'
function notValidEmail( str ){
    mailRE = new RegExp( );
    mailRE.compile( '^[._a-z0-9-]+@[.a-z0-9-]+[.]{1}[a-z]{2,4}$', 'gi' );
    return !(mailRE.test( str.value ));
}

// Checks to see if form element is empty
function checkform ( form )
{
  if (form.vstud_id.value == "") {
                alert("Please enter your Student ID Number." );
                form.vstud_id.focus();
                return false ;
                }
  else if ( notValidEmail ( form.vemail_add ) ) {
                alert("Please enter a valid E-mail Address." );
                form.vemail_add.focus();
                return false ;
                }
  else {
                return true ;
                }
}