function normalView()
   {
      document.styleSheets[0].disabled = false;
      document.styleSheets[1].disabled = true;
      document.styleSheets[2].disabled = true;
   }
   function smallView()
   {
      document.styleSheets[0].disabled = true;
      document.styleSheets[1].disabled = false;
      document.styleSheets[2].disabled = true;
   }
   function largeView()
   {
      document.styleSheets[0].disabled = true;
      document.styleSheets[1].disabled = true;
      document.styleSheets[2].disabled = false;
   }