var i = 0 ;
  var roads = new Array(6);

  function preload () {
/*

    if (navigator.appName=="Microsoft Internet Explorer")
      return ;
  
    for (i = 0 ; i < 6 ; i++) {
      roads[i] = new Image(800,30) ;
      roads[i].src = "/images/road"+(i+1)+".gif" ;
    }
    anim() ;
*/
  }

  function anim () {
/*
    if (i > 5) i = 0 ;
    document.body.style.backgroundImage="url('"+roads[i].src+"')" ;
    i++ ;
    setTimeout("anim()", 50) ;
*/
  }