iframe自适应高度

iframe自适应高度

说明
在A.html中iframe引用B.htm并且自适应高度。
在A.html 中插入<iframe src="B.html" frameborder="0" scrolling="no" hspace="0" marginwidth="0PX;" width="500" height="0"></iframe>其中宽度为B.html的宽度。
在B.html中插入以下代码。
程序代码 程序代码

<script type="text/javascript">
    <!--
    function iframeAutoFit()
    {
        try
        {
            if(window!=parent)
            {
                var a = parent.document.getElementsByTagName("IFRAME");
                for(var i=0; i<a.length; i++) //author:meizz
                {
                    if(a[i].contentWindow==window)
                    {
                        var h1=0, h2=0;
                        a[i].parentNode.style.height = a[i].offsetHeight +"px";
                        a[i].style.height = "0px";
                        if(document.documentElement&&document.documentElement.scrollHeight)
                        {
                            h1=document.documentElement.scrollHeight;
                        }
                        if(document.body) h2=document.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);
        //window.attachEvent("onresize",  iframeAutoFit);
    }
    else if(window.addEventListener)
    {
        window.addEventListener('load',  iframeAutoFit,  false);
        //window.addEventListener('resize',  iframeAutoFit,  false);
    }
    //-->
    </script>