原文发布时间为：2009-12-02 —— 来源于本人的百度文章 [由搬家工具导入]

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head> <title>拖动效果函数演示 by http://hi.baidu.com/handboy </title>
<style>
body
{
font-size:12px;
color:#333333;
border : 0px solid blue;
}
div
{
position : absolute;
background-color : #c3d9ff;
margin : 0px;
padding : 5px;
border : 0px;
width : 100px;
height:100px;
}
</style>
</head>
<body>
<script type="text/javascript">
function drag(o,s)
{
if (typeof o == "string") o = document.getElementById(o);
o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;
o.orig_y = parseInt(o.style.top) - document.body.scrollTop;
o.orig_index = o.style.zIndex;

o.onmousedown = function(a)
{
this.style.cursor = "move";
this.style.zIndex = 10000;
var d=document;
if(!a)a=window.event;
var x = a.clientX+d.body.scrollLeft-o.offsetLeft;
var y = a.clientY+d.body.scrollTop-o.offsetTop;
//author: hi.baidu.com/handboy
d.ondragstart = "return false;"
d.onselectstart = "return false;"
d.onselect = "document.selection.empty();"

if(o.setCapture)
o.setCapture();
else if(window.captureEvents)
window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);

        d.onmousemove = function(a)
{
if(!a)a=window.event;
o.style.left = a.clientX+document.body.scrollLeft-x;
o.style.top = a.clientY+document.body.scrollTop-y;
o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;
o.orig_y = parseInt(o.style.top) - document.body.scrollTop;
}

        d.onmouseup = function()
{
if(o.releaseCapture)
o.releaseCapture();
else if(window.captureEvents)
window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
d.onmousemove = null;
d.onmouseup = null;
d.ondragstart = null;
d.onselectstart = null;
d.onselect = null;
o.style.cursor = "normal";
o.style.zIndex = o.orig_index;
}
}

if (s)
{
var orig_scroll = window.onscroll?window.onscroll:function (){};
window.onscroll = function ()
{
orig_scroll();
o.style.left = o.orig_x + document.body.scrollLeft;
o.style.top = o.orig_y + document.body.scrollTop;
}
}
}
</script>

<div id="div1" style="left:10px;top:10px;">div1:我可以被拖动 </div>
<div id="div2" style="left:120px;top:10px;background-color : #f3d9ff">div2:来拖我呀 </div>
<div id="div3" style="left:230px;top:10px;background-color : #c3ffff">div3:我随便你拖 </div>
<div id="div4" style="left:10px;top:120px;background-color : #c3d944">div4:我可以随窗口滑动，把我拖到最下面，然后滚动网页看看 </div>
<div id="div5" style="left:120px;top:120px;background-color : #f3d944">作者: Handboy
<a href=http://www.longbill.cn target=_blank>hi.baidu.com/handboy </a>
</div>
<div id="div6" style="left:230px;top:120px;background-color : #e3f944;width:200px;">参数说明:

drag(obj [,scroll]);

obj:对象的id或对象本身;

scroll(可选):对象是否随窗口拖动而滑动，默认为否

鼠标右键查看源代码
</div>

<script type="text/javascript">
drag("div1");
drag("div2");
drag("div3");
drag("div4",1);
drag("div5",1);
drag("div6",1);

</script>

</body>
</html>

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