js滚动条平滑移动示例代码_javascript技巧

* { 
  margin:0px; 
  padding:0px; 
} 
#back { 
  position: absolute; 
  width: 100%; 
  top: 0px; 
  left: 0px; 
  z-index: 1; 
  background-image: url('../Images/psbg/bg7.png'); 
} 
#container{ 
  position:absolute; 
  width:100%; 
  top:0px; 
  left:0px; 
  z-index:100; 
  overflow:auto; 
} 
#main{ 
  position:absolute; 
  width:100%; 
  top:0px; 
  left:0px; 
} 
.d{ 
  margin-top:50px; 
} 
#bt{ 
  position:absolute; 
  top:0; 
  right:50px; 
  z-index:200; 
}