IFrame自适应高度

<script type="text/javascript">
    <!--
//此脚本放在子窗体中
    function iframeAutoFit()
    {
    return;
        try
       {
            if(window!=parent)
            {
                var a = parent.document.getElementsByTagName("IFRAME");
                for(var i=0; i<a.length; i++)
                {
                    if(a[i].contentWindow==window)
                    {
                        var h1=0, h2=0, d=document, dd=d.documentElement;
                        a[i].parentNode.style.height = a[i].offsetHeight +"px";
                        a[i].style.height = "10px";

                        if(dd && dd.scrollHeight) h1=dd.scrollHeight;
                        if(d.body) h2=d.body.scrollHeight;
                        var h=Math.max(h1, h2);

                        if(document.all){h += 4;}
                        if(window.opera){h += 1;}
                        a[i].style.height = a[i].parentNode.style.height = h +"px";
                    }
                }
            }
        }
        catch (ex){}       
    }
    if(window.attachEvent)
    {
        window.attachEvent("onload",  iframeAutoFit);
    }
    else if(window.addEventListener)
    {
        window.addEventListener('load',  iframeAutoFit,  false);
    }
    //-->
    </script>

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纵向参考