iframe 高度宽度自适应

                <iframe id="iframeHome" name="iframeHome" src="/Page/NewHome/GongZuoTai.html" scrolling="yes" onload="iFrameHeight()"
                        frameborder="0" style="padding: 0px; width:980px;float:left; margin:0; padding:0;"></iframe>

function iFrameHeight() {
    alert("123");
    var ifm = document.getElementById("iframeHome");
    var subWeb = document.frames ? document.frames["iframeHome"].document : ifm.contentDocument;
    if (ifm != null && subWeb != null) {
        ifm.height = subWeb.body.scrollHeight;
        ifm.width = subWeb.body.scrollWidth;
    }
}