Iframe InnerHTML Is Null

this same code was working yesterday, iframe[0].contentWindow.document.body.innerHTML has value 'success'. But, today iframe[0].contentWindow.document.body is ''. I cannot find inn

Solution 1:

Using different path to iframe innerHtml worked:

JS:

function fileUpload(form, action_url) {
    var iframe = document.createElement("iframe");
    iframe.setAttribute("id", "frame");
    iframe.setAttribute("name", "frame");
    iframe.setAttribute("width", "0");
    iframe.setAttribute("height", "0");
    iframe.setAttribute("frameborder", "0");

    form.parentNode.appendChild(iframe);

    iframeId = document.getElementById("frame");

    var eventHandler = function () {

        if (iframeId.detachEvent) iframeId.detachEvent("onload", eventHandler);
        else iframeId.removeEventListener("load", eventHandler, false);

        if (iframeId.contentDocument) {
            content = iframeId.contentDocument.body.innerHTML;
        } else if (iframeId.contentWindow) {
            content = iframeId.contentWindow.document.body.innerHTML;
        } else if (iframeId.document) {
            content = iframeId.document.body.innerHTML;
        }

        setTimeout('iframeId.parentNode.removeChild(iframeId)', 200);
    }

    if (iframeId.addEventListener) iframeId.addEventListener("load", eventHandler, true);
    if (iframeId.attachEvent) iframeId.attachEvent("onload", eventHandler);

    form.setAttribute("target", "frame");
    form.setAttribute("action", action_url);
    form.setAttribute("method", "post");

    form.submit();
}

Html:

<form>
    <input type="file" name="file" /></br>
    <input type="button" value="upload" onClick="fileUpload(this.form,'url'); return false;" >
</form>