<style type="text/css">

/*弹出层*/

#winbox{position:absolute; top:0px; left:0px;background-color: rgba(0,0,0,0.5); display:none; width:100%; height:100%}

#winbox .con{position:fixed;width:800px;height:520px; left:0px; right:0px; margin:0px auto;top:100px;background:#fff;z-index:1;}

#winbox .close{float:right; cursor:pointer; font-size:14px; margin:5px 10px;}

</style>

<div id="winbox">

<div class="con">

<b class="close" onClick="closewin()">关闭</b>

<iframe name="winmain" id="winmain" style="width:100%;height:100%" frameborder="0" scrolling="no" src=""></iframe>

</div>

</div>

<script type="text/javascript">

function openwin(bigclassid,smallclassid){

document.getElementById("winbox").style.display="block";

document.getElementById("winmain").src="exam_paper_smallclass.php?bigclassid="+bigclassid+"&smallclassid="+smallclassid;

}

function closewin(){

document.getElementById("winbox").style.display="none";

}

</script>