html,body{overflow:hidden;}
body{text-align:center;background-color:#eee;}
#box{margin:25px auto auto auto;width:500px;height:500px;border:5px solid #666;background-color:#fff;position:relative;overflow:hidden;}
#sky{position:absolute;left:0;top:0;width:500px;height:350px;background-image:url(sky.gif);}
#hill{position:absolute;left:0;top:314px;width:500px;height:36px;background-image:url(hill.gif);}
#road{position:absolute;left:0;top:350px;width:500px;height:150px;}
#rockl, #rockr{position:absolute;left:0;top:0;width:5px;height:5px;overflow:hidden;}
#car{position:absolute;left:193px;top:440px;width:114px;height:45px;z-index:10;}
#car2{position:absolute;left:0;top:350px;width:97px;height:44px;display:none;}
#life{position:absolute;left:10px;top:10px;width:100px;height:10px;background:url(life.gif) no-repeat 0 0;overflow:hidden;text-align:left;}
#life-inner{height:100%;background:url(life.gif) no-repeat 0 -10px;}
#tip{line-height:26px;}