if (document.images) {
     roll1 = new Image
     roll2 = new Image
     roll3 = new Image
     roll4 = new Image
     roll5 = new Image
     roll6 = new Image
     roll7 = new Image
     roll8 = new Image
     roll9 = new Image
     roll10 = new Image
     roll11 = new Image
     roll12 = new Image
     roll13 = new Image
     roll14 = new Image
     roll15 = new Image
     roll16 = new Image
     roll17 = new Image
     roll18 = new Image
     roll19 = new Image
     roll20 = new Image



     roll1.src = 'images/but_home.gif'
     roll2.src = 'images/but_home_on.gif'
     
     roll3.src = 'images/but_order.gif'
     roll4.src = 'images/but_order_on.gif'
     
     roll5.src = 'images/but_rewards.gif'
     roll6.src = 'images/but_rewards_on.gif'
     
     roll7.src = 'images/but_custcare.gif'
     roll8.src = 'images/but_custcare_on.gif'
     
     roll9.src = 'images/but_news.gif'
     roll10.src = 'images/but_news_on.gif'
     
     roll11.src = 'images/but_specials.gif'
     roll12.src = 'images/but_specials_on.gif'
     
     roll13.src = 'images/but_about.gif'
     roll14.src = 'images/but_about_on.gif'

     roll15.src = 'images/reward_join.gif'
     roll16.src = 'images/reward_join_on.gif'

     roll17.src = 'images/r_mid.gif'
     roll18.src = 'images/r_mid_on.gif'

     roll19.src = 'images/catalogue.gif'
     roll20.src = 'images/catalogue_on.gif'
 }