if (document.images) {
      pl1 = new Image
      pl2 = new Image
      pl1.src = 'img/menu/pl1.jpg' 
      pl2.src = 'img/menu/pl2.jpg'
   }
   else {
      pl1=""
      pl2=""
      document.pl=""
      }
      
         if (document.images) {
      en1 = new Image
      en2 = new Image
      en1.src = 'img/menu/en1.jpg' 
      en2.src = 'img/menu/en2.jpg'
   }
   else {
      en1=""
      en2=""
      document.en=""
      }