if(document.images)
 {

  var topon = new Image();
   topon.src="../layout/signlogob.jpg";
  var topoff = new Image();
   topoff.src="../layout/signlogoa.jpg";

  var repairon = new Image();
   repairon.src="../layout/nrepairb.jpg";
  var repairoff = new Image();
   repairoff.src="../layout/nrepaira.jpg";

  var dyingon = new Image();
   dyingon.src="../layout/ndyingb.jpg";
  var dyingoff = new Image();
   dyingoff.src="../layout/ndyinga.jpg";

  var supplieson = new Image();
   supplieson.src="../layout/nsuppliesb.jpg";
  var suppliesoff = new Image();
   suppliesoff.src="../layout/nsuppliesa.jpg";

  var directionson = new Image();
   directionson.src="../layout/nfindb.jpg";
  var directionsoff = new Image();
   directionsoff.src="../layout/nfinda.jpg";

  var historyon = new Image();
   historyon.src="../layout/nhistoryb.jpg";
  var historyoff = new Image();
   historyoff.src="../layout/nhistorya.jpg";  
   
  var author1on = new Image();
   author1on.src="../layout/logo1.jpg";
  var author1off = new Image();
   author1off.src="../layout/logo1b.jpg";


  }