if (document.images)
{  
  offImg = new Array();
  onImg = new Array();
  for (var i = 1; i<=6; i++)
  { 	
    offImg[i] = new Image();
    offImg[i].src = "/images/" + "b"+ i + "0.gif";
    onImg[i] = new Image();
    onImg[i].src = "/images/" + "b" + i + "1.gif";
  }  
} 
function swapImg()
{
  if (document.images) { document[swapImg.arguments[0]].src = eval(swapImg.arguments[1] + ".src"); }
}