if (document.images) {
shopoff=new Image();
shopoff.src= "images/menus/shopoff.gif";
shopon=new Image();
shopon.src= "images/menus/shopon.gif";
pressoff=new Image();
pressoff.src= "images/menus/pressoff.gif";
presson=new Image();
presson.src= "images/menus/presson.gif";
endorsementsoff=new Image();
endorsementsoff.src= "images/menus/endorsementsoff.gif";
endorsementson=new Image();
endorsementson.src= "images/menus/endorsementson.gif";
showsoff=new Image();
showsoff.src= "images/menus/showsoff.gif";
showson=new Image();
showson.src= "images/menus/showson.gif";
cartoff=new Image();
cartoff.src= "images/menus/cartoff.gif";
carton=new Image();
carton.src= "images/menus/carton.gif";
aboutoff=new Image();
aboutoff.src= "images/menus/aboutoff.gif";
abouton=new Image();
abouton.src= "images/menus/abouton.gif";
}

function imageOn (imagename){
  document[imagename].src=eval(imagename+"on.src");
 }
function imageOff (imagename){
  document[imagename].src=eval(imagename+"off.src");
 }