function loadpic(){
if (document.images) {
  pic1on = new Image();
  pic1on.src =  "homeon.jpg";
  pic1off = new Image();
  pic1off.src =  "home.jpg"; 
  pic2on = new Image();
  pic2on.src =  "profileon.jpg";
  pic2off = new Image();
  pic2off.src =  "profile.jpg"; 
  pic3on = new Image();
  pic3on.src =  "producton.jpg";
  pic3off = new Image();
  pic3off.src =  "product.jpg"; 
  pic4on = new Image();
  pic4on.src =  "contacton.jpg";
  pic4off = new Image();
  pic4off.src =  "contact.jpg"; 
  }
}
function changeImages() {
  if (document.images) {
document[changeImages.arguments[0]].src = eval(changeImages.arguments[1] + ".src");
  }
}