做web程序经常要使用弹出层

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http://www.cnblogs.com/qiantuwuliang/archive/2009/08/03/1537205.html

<!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>jQuery - Start Animation</title>

    <script type="text/javascript" src="../scripts/jquery-1.3.2-vsdoc2.js"></script>

    <script type="text/javascript">
        $(document).ready(function()
        {
            //动画速度
            var speed = 500;

            //绑定事件处理
            $("#btnShow").click(function(event)
            {
                //取消事件冒泡
                event.stopPropagation();
                //设置弹出层位置
                var offset = $(event.target).offset();
                $("#divPop").css({ top: offset.top + $(event.target).height() + "px", left: offset.left });
                //动画显示
                $("#divPop").show(speed);

            });
            //单击空白区域隐藏弹出层
            $(document).click(function(event) { $("#divPop").hide(speed) });
            //单击弹出层则自身隐藏
            $("#divPop").click(function(event) { $("#divPop").hide(speed) });
        });
    </script>

</head>
<body>
    <div>
        <br /><br /><br />
        <button id="btnShow">显示提示文字</button>
    </div>

    
    <div id="divPop" style="background-color: #f0f0f0; border: solid 1px #000000; position: absolute; display:none;
        width: 300px; height: 100px;">
        <div style="text-align: center;">弹出层</div>
    </div>
</body>
</html>