js实现一点击组件滚动条到最下面

                     <script type="text/javascript">       
                        function scrollT(){
                           window.scrollTo(0,document.body.scrollHeight);
                           }
                          function fgg(){
                            var ttt11 = document.getElementById("form1:ttt").value;
                           if(ttt11!=""){
                           document.getElementById("form1:ttt").value="";
                           setTimeout("scrollT()",0);
                            }
                          }

                      </script>

这个是onload的方法，然后你在你要点击的组件上用一个action事件里面把ttt这个文本框负一个值  这样你一点那个组件，滚动条就下到最下面了