想写一个简单的窗口拖动代码，但总是实现不了，这样写有什么问题？

Question

window.onload=drag;  function drag(){  var title_box = document.getElementById('title_box');   title_box.onmousedown=fnDown;  }   function fnDown(event){  var oDrag = document.getElementById('title_box'),   disX = event.clientX-oDrag.offsetLeft,   disY = event.clientY-oDrag.offsetTop;  document.onmousemove=function(event){   fnMove(event,disX,disY);   }  } function fnMove(event,disX,disY){   var oDrag = document.getElementById('title_box'),   l = event.clientX-disX,   t = event.clientY-disY;   oDrag.style.left = l+'px';   oDrag.style.top = t+'px';  }

Answer 1

你可以使用easyUI ，基于jquery的框架