function checkform ( FrontPage_Form1 )
{
    if (FrontPage_Form1.email.value == "")
    {
    alert( "U moet uw e-mail adres nog invullen." );
    FrontPage_Form1.email.focus();
    return false ;
    }
 
    if (FrontPage_Form1.naam.value == "")
    {
    alert( "U moet uw naam nog invullen." );
    FrontPage_Form1.naam.focus();
    return false ;
    }


    if (FrontPage_Form1.telefoon.value == "")
    {
    alert( "U moet uw naam nog invullen." );
    FrontPage_Form1.telefoon.focus();
    return false ;
    }


 
 
  return true ;
}