javascript拖动小例子

html
head
meta http-equiv="Content" content="text/html;chartset=utf-8"
titletest drag/title
style type="text/css"
!--
.drag {
width:100px;
height:100px;
position:absolute;
left:10px;
top:10px;
background-color:blue;
}
--
/style
script type="text/javascript"
!--
function drag(target,event)
{
   var deltaX = event.clientX-parseInt(target.style.left);
   var deltaY = event.clientY-parseInt(target.style.top);
  
   document.attachEvent("onmousemove",movehandle);
   document.attachEvent("onmouseup",uphandle);

   function movehandle()
   {
    target.style.left = event.clientX-deltaX;
    target.style.top = event.clientY-deltaY;
   }

   function uphandle()
   {
    document.detachEvent("onmousemove",movehandle);
    document.detachEvent("onmouseup",uphandle);
   }
}
--
/script
/head
body
div id="drag1" class="drag" style="left:10px;top:10px;background-color:red;"  onmousedown="drag(this,event);" show me you 2/div
div id="drag" class="drag" onmousedown="drag(this,event);" style="left:10px;top:10px;"show me you/div

/body
/html