How to get the body's content of an iframe in Javascript?

Using JQuery, try this:

$("#id_description_iframe").contents().find("body").html()

AFAIK, an Iframe cannot be used that way. You need to point its src attribute to another page.

Here's how to get its body content using plane old javascript. This works with both IE and Firefox.

function getFrameContents(){
   var iFrame =  document.getElementById('id_description_iframe');
   var iFrameBody;
   if ( iFrame.contentDocument ) 
   { // FF
     iFrameBody = iFrame.contentDocument.getElementsByTagName('body')[0];
   }
   else if ( iFrame.contentWindow ) 
   { // IE
     iFrameBody = iFrame.contentWindow.document.getElementsByTagName('body')[0];
   }
    alert(iFrameBody.innerHTML);
 }

I think placing text inbetween the tags is reserved for browsers that cant handle iframes i.e...

<iframe src ="html_intro.asp" width="100%" height="300">
  <p>Your browser does not support iframes.</p>
</iframe>

You use the 'src' attribute to set the source of the iframes html...

Hope that helps :)

Chalkey is correct, you need to use the src attribute to specify the page to be contained in the iframe. Providing you do this, and the document in the iframe is in the same domain as the parent document, you can use this:

var e = document.getElementById("id_description_iframe");
if(e != null) {
   alert(e.contentWindow.document.body.innerHTML);
}

Obviously you can then do something useful with the contents instead of just putting them in an alert.

To get body content from javascript ,i have tried the following code:

var frameObj = document.getElementById('id_description_iframe');

var frameContent = frameObj.contentWindow.document.body.innerHTML;

where "id_description_iframe" is your iframe's id. This code is working fine for me.

The following code is cross-browser compliant. It works in IE7, IE8, Fx 3, Safari, and Chrome, so no need to handle cross-browser issues. Did not test in IE6.

<iframe id="iframeId" name="iframeId">...</iframe>

<script type="text/javascript">
    var iframeDoc;
    if (window.frames && window.frames.iframeId &&
        (iframeDoc = window.frames.iframeId.document)) {
        var iframeBody = iframeDoc.body;
        var ifromContent = iframeBody.innerHTML;
    }
</script>

If you want to not just select the body of your iframe, but also insert some content to it, and do that with pure JS, and with no JQuery, and without document.write(), I have a solution that no other answer provides.

You can use the following steps

1.Select your iframe:

var iframe = document.getElementById("adblock_iframe");

2.Create an element that you want to insert into the frame, let's say an image:

var img = document.createElement('img');
img.src = "https://server-name.com/upload/adblock" + id + ".jpg";
img.style.paddingLeft = "450px";
//scale down the image is we have a high resolution screen on the client side
if (retina_test_media == true && high_res_test == true) {
    img.style.width = "200px";
    img.style.height = "50px";
} else {
    img.style.width = "400px";
    img.style.height = "100px";
}
img.id = "image";

3.Insert the image element into the iframe:

iframe.contentWindow.document.body.appendChild(img);

You can get the contents of the iframe body in one line of code:

document.getElementsByTagName('iframe')[0].contentWindow.document.body.innerText;