設置瀏覽器滾動條到底部的方法

var height = 99999;

if(typeof window.pageYOffset != 'undefined'){

  window.pageYOffset = height;
}
if(typeof document.compatMode != 'undefined' &&
    document.compatMode != 'BackCompat'){
    document.documentElement.scrollTop = height;
 }
if(typeof document.body != 'undefined'){
     scrollTop = document.body.scrollTop = height;
 }