前端：设置iframe自适应高度和宽度

<iframe id="rightFrame" name="rightFrame" marginwidth="0" marginheight="0" src="${ctx }/admin/home" frameborder="0" width="100%" scrolling="no" onLoad="iFrameHeight()">
</iframe>

<script type="text/javascript">
    function iFrameHeight() {
        var ifm= document.getElementById("rightFrame"); 
        var subWeb = document.frames ? document.frames["rightFrame"].document : ifm.contentDocument; 
        if(ifm != null && subWeb != null) { 
              ifm.height = subWeb.body.scrollHeight; 
        } 
    } 
</script>