var overImages = Array ();

overImages[0] = '/images/20_bt11.gif';
overImages[1] = '/images/20_bt21.gif';
overImages[2] = '/images/20_bt31.gif';
overImages[3] = '/images/20_bt41.gif';
overImages[4] = '/images/20_bt51.gif';
overImages[5] = '/images/20_bt61.gif';
overImages[6] = '/images/20_bt71.gif';

var offImages = Array ();

offImages[0] = '/images/20_bt10.gif';
offImages[1] = '/images/20_bt20.gif';
offImages[2] = '/images/20_bt30.gif';
offImages[3] = '/images/20_bt40.gif';
offImages[4] = '/images/20_bt50.gif';
offImages[5] = '/images/20_bt60.gif';
offImages[6] = '/images/20_bt70.gif';