imShop = new Image();
imShop.src = 'images/Bshop.gif';
imShopOn = new Image();
imShopOn.src = 'images/BshopOn.gif';
cartOn = new Image();
cartOn.src = 'images/cartOn.gif';
cartNat = new Image();
cartNat.src = 'images/cart.gif';


function shopOn(which){
	imgName = 'shop'+which;
 	eval('document.'+imgName+'.src = imShopOn.src');
}
function shopOut(which){
	imgName = 'shop'+which;
	eval('document.'+imgName+'.src = imShop.src');
}
function changeCart(){
	document.cart.src = cartOn.src;
}
function cartBack(){
	document.cart.src = cartNat.src;
}