这个是窗口图层可随意拖动特效，该图层拖动特效兼容当前主流浏览器，可在网页中随意拖动效果。
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<title>兼容多种浏览器可拖动图层窗口_武鸣人</title>
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<div id="wuming_ren">可拖动窗口</div>
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