iframe.document.body.scrollHeight is double the correct value

Posted by Dean J on Stack Overflow See other posts from Stack Overflow or by Dean J
Published on 2010-04-21T16:21:06Z Indexed on 2010/04/21 16:23 UTC
Read the original article Hit count: 397

Filed under:

iframe

|

JavaScript

|

cross-browser

<iframe name="asdf" id="asdf" onload="change_height(this)" src="asdf.jsp" width="250" scrolling="no" frameborder="0"></iframe>

        function change_height(iframe) {
            if (document.all) {
                // IE.
                ieheight = iframe.document.body.scrollHeight;
                iframe.style.height = ieheight;
            } else {
                // Firefox.
                ffheight= iframe.contentDocument.body.offsetHeight;
                iframe.style.height = ffheight+ 'px';

            }
        }

ieheight is twice the actual height when this runs in IE7; haven't tested on IE6. It's the same value if I use scrollHeight or offsetHeight.

It's the correct height in Firefox.

Before I patch this by just dividing the IE value /2, what's the right way to do this?

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