function zipValidate(){
val = document.zipForm.zip.value;

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      case "91066":
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      case "90036":
      case "90037":
         document.location = 'http://www.drtek.com/los_angeles_onsite_computer_services_available.php';
         break;
      default:
         document.location = 'http://www.drtek.com/remote_computer_services.php';
         break;
   }
}