分享javascript动态移动滚动条至底部的例子

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);
   }
}