蒙版

<script type="text/javascript">
        window.onload = function ()
        {
            var msg = document.getElementById("msg");
            var ifr = document.createElement("iframe");
            ifr.style.position = "absolute";
            ifr.style.display = "block";
            ifr.style.zIndex = "9999999";

            ifr.style.left = msg.offsetLeft;
            ifr.style.top = msg.offsetTop;
            ifr.width = "190px";
            ifr.height = "180px";


            ifr.scrolling = "no";
            ifr.frameborder = "1px";
            msg.appendChild(ifr);
            msg.zIndex = "9999999";
        }
    </script>

<div id="msg" style="width:285px;height:275px;padding:0px;overflow:hidden;margin-left:22px;border: #FF0000 1px solid">
           <iframe id="iframenews" src="arm.html" width="290" height="274" frameborder="0" marginheight="0" marginwidth="0" scrolling="No" allowtransparency="true" ></iframe>
      </div>