js 滚动条控制滚动内容，与其同步

Question

      
   现在我有一个html网页，内容是滚动的，并且内容的右边是一个滚动条,我想实现，当鼠标拉动滚动条的时候，滚动的内容要和滚动条同步。  急！！！高手请进……

Answer 1

  我的滚动代码是：
                                         var speed = 40; 
                                    var tab = document.getElementById("box");
                                    var tab1 = document.getElementById("box1");
                                    var tab2 = document.getElementById("box2");
                                    tab2.innerHTML = tab1.innerHTML;  
                                    function Marquee() {
                                        if (tab2.offsetTop - tab.scrollTop <= 0) 
                                            tab.scrollTop -= tab1.offsetHeight  
                                        else {
                                            tab.scrollTop++
                                        }
                                    }
                                    var MyMar = setInterval(Marquee, speed);
                                    tab.onmouseover = function () { clearInterval(MyMar) };  
                                    tab.onmouseout = function () { MyMar = setInterval(Marquee, speed) };  怎么样动态加载？？？？