function getForm() {
    var zip    = $F("zip");
    
    //default
    var page   = "formb3.php";
    var senior = $F("is_over65_0");
    var extra  = "&is_over65=" + senior;
    
    if(( $("is_over65_1").checked )) {
      senior = $F("is_over65_1");
      page   = "quote-sr.php";
      extra  = "";
    }
    var params  = "toolbar=yes,menubar=yes,location=yes,scrollbars=yes,resizable=yes,status=yes,";
    params     += "width=" + screen.width;
    params     += ",height=" + screen.height;
    params     += ",fullscreen=yes"
    var pops    = page + "?address1_zip=" + zip + extra
    window.open(pops, "", params);
  }

  Event.observe(window, 'load', function() {
    Event.observe('submit', 'click', function(e){
      if(!/^\d{5}$/.test($F("zip"))){
        alert("Please enter a valid zip code.");
        $("zip").focus();
        Event.stop(e);
      }
    });
  });