if (document.images) {
    out = new Image(); 
	out.src = "images/buy.gif";
	over = new Image(); 
	over.src = "images/buy_on.gif";
	out = new Image(); 
	out.src = "images/inv.gif";
	over = new Image(); 
	over.src = "images/inv_on.gif";
	out = new Image(); 
	out.src = "images/surp.gif";
	over = new Image(); 
	over.src = "images/surp_on.gif";
	out = new Image(); 
	out.src = "images/about.gif";
	over = new Image(); 
	over.src = "images/about_on.gif";
	out = new Image(); 
	out.src = "images/aff.gif";
	over = new Image(); 
	over.src = "images/aff_on.gif";
}
function swapImageIn(obj, img) {
	if (document.images){
			document.images[obj].src = img;
	}
  }