function newImage( imgSrc ){

 var imgName = new Image();
 imgName.src = imgSrc;

 return imgName;

}

function change( imgName, imgLocation )
{
 document[imgName].src = imgLocation ;
}

var preloadFlag = false;
function loadImages()
{
 if (document.images)
 {

  default_over = newImage("/images/giantsicon_on.jpg");
  products_over = newImage("/images/oaklandicon_on.jpg");
  learn_over = newImage("/images/kingsicon_on.jpg");

  preloadFlag = true;

  changeImage();
 }
}