<div id="divpop" style="position:fixed;left:10px;top:10px;z-index:200;visibility:hidden;">
<table width=300 height=400 cellpadding=2 cellspacing=0>
<tr>
    <td style="border:1px #666666 solid" height=360 align=center bgcolor=white>
    <img src="/cn/images/pop/popcn1.jpg" alt="">
    </td>
</tr>
<tr>
        <form name="notice_form">
    <td align=right bgcolor=white>
        <input type="checkbox" name="chkbox" value="checkbox">오늘 하루 이 창을 열지 않음
        <a href="javascript:closeWin();"><B>[닫기]</B></a>
    </td>
</tr>
        </form>
</table>
</div> 
<script language="Javascript">
cookiedata = document.cookie;   
if ( cookiedata.indexOf("maindiv=done") < 0 ){     
    document.all['divpop'].style.visibility = "visible";
    }
    else {
        document.all['divpop'].style.visibility = "hidden";
}
</script>
 
style.css
#main-pop{position:absolute; z-index: 999; border:1px solid #ccc;}
#main-pop .pop-cookie{padding:10px; background: #f8f8f8; border-top:#ccc 1px solid;}