js动态移动滚动条至底部示例代码

复制代码 代码如下:

  var currentPosition,timer;

  function GoBottom(){

  timer=setInterval("runToBottom()",50);

  }

  function runToBottom(){

  currentPosition=document.documentElement.scrollTop || document.body.scrollTop;

  currentPosition+=30;

  if(currentPosition<document.body.scrollHeight && (document.body.clientHeight + document.body.scrollTop < document.body.scrollHeight))

  {

  //window.scrollTo(0,currentPosition);

  //alert(document.documentElement.clientHeight + " " + document.documentElement.scrollTop + " " + document.documentElement.scrollHeight + "#" +document.body.clientHeight + " " + document.body.scrollTop + " " + document.body.scrollHeight);

  document.body.scrollTop = currentPosition;

  }

  else

  {

  document.body.scrollTop = document.body.scrollHeight;

  clearInterval(timer);

  }

  }