if (document.images) {
     cart1 = new Image
     cart2 = new Image

     account1 = new Image
     account2 = new Image

     cart1.src = 'images/header_cart.gif'
     cart2.src = 'images/header_cart_r.gif'

     account1.src = 'images/header_account.gif'
     account2.src = 'images/header_account_r.gif'
 }