roll_1 = new Image();
noroll_1 = new Image();
roll_1.src = '../images/bt_home_rl.gif';
noroll_1.src = '../images/bt_home.gif';


roll_2 = new Image();
noroll_2 = new Image();
roll_2.src = '../images/bt_about_rl.gif';
noroll_2.src = '../images/bt_about.gif';

roll_3 = new Image();
noroll_3 = new Image();
roll_3.src = '../images/bt_products_rl.gif';
noroll_3.src = '../images/bt_products.gif';

roll_4 = new Image();
noroll_4 = new Image();
roll_4.src = '../images/bt_news_rl.gif';
noroll_4.src = '../images/bt_news.gif';

roll_5 = new Image();
noroll_5 = new Image();
roll_5.src = '../images/bt_careers_rl.gif';
noroll_5.src = '../images/bt_careers.gif';

roll_6 = new Image();
noroll_6 = new Image();
roll_6.src = '../images/bt_contacts_rl.gif';
noroll_6.src = '../images/bt_contacts.gif';

roll_7 = new Image();
noroll_7 = new Image();
roll_7.src = '../images/bt_user_decisionmaker_rl.gif';
noroll_7.src = '../images/bt_user_decisionmaker.gif';

roll_8 = new Image();
noroll_8 = new Image();
roll_8.src = '../images/bt_user_developer_rl.gif';
noroll_8.src = '../images/bt_user_developer.gif';

roll_9 = new Image();
noroll_9 = new Image();
roll_9.src = '../images/bt_demo_rl.gif';
noroll_9.src = '../images/bt_demo.gif';

roll_10 = new Image();
noroll_10 = new Image();
roll_10.src = '../images/bt_experiencedemo_rl.gif';
noroll_10.src = '../images/bt_experiencedemo.gif';

function flip(iname, oname)
{
  document.images[iname].src = oname;
}