function doPreload()
   {
    Preload('./images/srgtop.jpg', './images/background.jpg', './images/button_slice.jpg', './images/pipe.jpg', './images/about.jpg', './images/service.jpg', './images/specialties.jpg', './images/contact.jpg', './images/about_on.jpg', './images/service_on.jpg', './images/specialties_on.jpg', './images/contact_on.jpg');
   }  
   function openpopup(popurl){
    winpops=window.open(popurl,"","width=770,height=600,toolbar,location,status,scrollbars,menubar,resizable,")
   }