javascript弹出一个层并增加一个覆盖层_javascript技巧

注意上面的代码头部DTD应该是这样：

<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Untitled</title> fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf <input name="button2" onclick="ShopConfirm('fdsaf')" value="点我" type="button"> fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf <input name="button" onclick="ShopConfirm('fdsaf')" value="点我" type="button"><div id="ShopConfirmLayer" style="position:absolute;top:300px;left:100px;z-index:900;border:1px red solid;width:500px;display:none;"> fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf fdasfsdfadf <input name="button1" value="关闭" type="button" onclick="CloseShopConfirm()"> </div>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]