用JavaScript移动对象

                            　drag me->  <-drag me

源代码：

<script type="text/javascript">...
var xOffset,yOffset;
function dragStart()
...{
    var obj=event.srcElement;
    obj.style.position="absolute";
    obj.setCapture();
    xOffset=event.x-obj.offsetLeft;
    yOffset=event.y-obj.offsetTop;
}
function doDrag()
...{
    event.srcElement.style.left=event.x-xOffset;
    event.srcElement.style.top =event.y-yOffset;
}
function dragEnd()
...{
    event.srcElement.style.cursor="default";
    event.srcElement.releaseCapture();
}
</script>
<img src="http://www.w3.org/Icons/valid-xhtml10.png" onmousedown="this.style.cursor='move'" onmouseup="this.style.cursor='default'" ondragstart="dragStart()" ondrag="doDrag()" ondragend="dragEnd()" />