自定义弹出div对话框

时间：2022-07-28 18:09:26
<style type="text/css">

html,body{height:100%;overflow:hidden;}

body,div,h2{margin:0;padding:0;}

body{font:12px/1.5 Tahoma;}

#overlay #win center{padding-top:10px;}

#overlay #win button{cursor:pointer;}

/*

opacity:不透明度;

*/

#overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#000;opacity:0.5;filter:alpha(opacity=50);display:none;}

#win{position:absolute;top:50%;left:50%;width:400px;height:200px;background:#fff;border:4px solid #4E85FA;margin:-102px 0 0 -202px;display:none;}

#win h2{font-size:12px;height:18px;text-align:right;background:#4E85FA;border-bottom:3px solid #4E85FA;padding:5px;cursor:move;}

#win h2 span{color:#4E85FA;cursor:pointer;background:#fff;border:1px solid #4E85FA;padding:0 2px;}

#win #urlcontent

{

 margin:10px 20px 0px;

 text-align:center;

 font-size:12pt;

 color:#03C;

}

#urlcontent a:hover{

	text-decoration:underline;

}

</style>

　　

<script>

window.onload = function ()

{

    var oWin = document.getElementById("win");

    var oLay = document.getElementById("overlay");

    var oBtn = document.getElementsByTagName("button")[0];

    var oClose = document.getElementById("close");

    var oH2 = oWin.getElementsByTagName("h2")[0];

    var bDrag = false;

    var disX = disY = 0;

    oBtn.onclick = function ()

    {

        oLay.style.display = "block";

        oWin.style.display = "block"

    };

    oClose.onclick = function ()

    {

        oLay.style.display = "none";

        oWin.style.display = "none"

    };

    oClose.onmousedown = function (event)

    {

        (event || window.event).cancelBubble = true;

    };

    oH2.onmousedown = function (event)

    {

        var event = event || window.event;

        bDrag = true;

        disX = event.clientX - oWin.offsetLeft;

        disY = event.clientY - oWin.offsetTop;

        this.setCapture && this.setCapture();

        return false

    };

    document.onmousemove = function (event)

    {

        if (!bDrag) return;

        var event = event || window.event;

        var iL = event.clientX - disX;

        var iT = event.clientY - disY;

        var maxL = document.documentElement.clientWidth - oWin.offsetWidth;

        var maxT = document.documentElement.clientHeight - oWin.offsetHeight;

        iL = iL < 0 ? 0 : iL;

        iL = iL > maxL ? maxL : iL;

        iT = iT < 0 ? 0 : iT;

        iT = iT > maxT ? maxT : iT;

        oWin.style.marginTop = oWin.style.marginLeft = 0;

        oWin.style.left = iL + "px";

        oWin.style.top = iT + "px";

        return false

    };

    document.onmouseup = window.onblur = oH2.onlosecapture = function ()

    {

        bDrag = false;

        oH2.releaseCapture && oH2.releaseCapture();

    };

};

</script>

　　

<body>

<div id="overlay"></div>

  <div id="win">

   <h2>

    <span id="close">×</span>

   </h2>

   <div id="urlcontent">

     <a href="#" style=" text-decoration:none">下载</a>

   </div>

</div>

<center><button>弹出层</button></center>

</body>

　　

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