<!-- // hide script from old browsers

// define images

if(document.images) {

  image01 = new Image;
  image02 = new Image;
  image11 = new Image;
  image12 = new Image;
  image21 = new Image;
  image22 = new Image;
  image31 = new Image;
  image32 = new Image;

  
// source images

  image01.src = "images/bt_Home-Off.gif";
  image02.src = "images/bt_Home-On.gif";
  image11.src = "images/bt_About-Off.gif";
  image12.src = "images/bt_About-On.gif";
  image21.src = "images/bt_Portfolio-Off.gif";
  image22.src = "images/bt_Portfolio-On.gif";
  image31.src = "images/bt_Contact-Off.gif";
  image32.src = "images/bt_Contact-On.gif";


}

/// MouseOver Function

function swapOn(imgLocation) {
  if(document.images) {
    document.images[imgLocation].src = eval(imgLocation + "2.src");
  }
}

// MouseOut Function

function swapOff(imgLocation) {
  if(document.images) {
    document.images[imgLocation].src = eval(imgLocation + "1.src");
  }
}

// end hiding script -->