[Javascript] iframe innerHTML

var x = document.getElementsByTagName(“iframe”)[0];

​var y = null;

if (x.contentWindow != null) {

    y = x.contentWindow;

} else if (x.contentDocument != null) {

    y = x.contentDocument;

}

if (y != null && y.document != null) {

    y = y.document;

}

y.getElementsByTagName(“html”)[0].innerHTML = “contents”;

function getFrameDocument(_iframeId) {

    var frameObj = document.getElementById(_iframeId);

    var frameDoc = null;

    if (frameObj.contentWindow != null) {

        frameDoc = frameObj.contentWindow;

    } else if (frameObj.contentDocument != null) {

        frameDoc = frameObj.contentDocument;

    }

    if (frameDoc != null && frameDoc.document != null) {

        frameDoc = frameDoc.document;

    }

    return frameDoc;

}

var frameDoc = getFrameDocument(“draftActionFrame”);

if (frameDoc != null && frameDoc.getElementsByTagName(“html”) != null) {

    alert(frameDoc.getElementsByTagName(“html”)[0].innerHTML);

}