    function reinitIframe(){
    var iframe = document.getElementById("frame_content");
    try{
    var bHeight = iframe.contentWindow.document.body.scrollHeight;
    var dHeight = iframe.contentWindow.document.documentElement.scrollHeight;
    var height = Math.max(bHeight, dHeight);
    iframe.height =  height;
    }catch (ex){}
    }

    window.setInterval("reinitIframe()", 200);