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How To Adjust IFrame Height on Its Content

, 6 Jul 2007 167.4K 21
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How to adjust an iFrame height to its content: tested in Mozilla, Opera, Internet Explorer

Introduction

Some browsers do not support all W3C standards and you will face a problem when you want to adjust IFrame height on its content using JavaScript. I have spent some hours experimenting with different DOM-objects and I have found quite a good solution for Mozilla, Internet Explorer and Opera browsers.

Using the Code

If you have IFrame in your HTML, the first step is to add onload handler as follows:

<iframe id='myFrame' 

frameborder=0 scrolling=no width=100%  

src="..."
    onload='adjustMyFrameSize

();'> 
</iframe> 

Then you need to place such a script BEFORE the IFrame element:

 <script type="text/javascript">
    
    function getElement(aID)
    {
        return (document.getElementById) ?
            document.getElementById(aID) : 

document.all[aID];
    }

    function getIFrameDocument(aID){ 
        var rv = null; 
        var frame=getElement(aID);
        // if contentDocument exists, W3C 

compliant (e.g. Mozilla) 
        if (frame.contentDocument)
            rv = frame.contentDocument;
        else // bad Internet Explorer  ;)
            rv = document.frames[aID].document;
        return rv;
    }

    function adjustMyFrameHeight()
    {
        var frame = getElement

("myFrame");
        var frameDoc = getIFrameDocument

("myFrame");
        frame.height = frameDoc.body.offsetHeight;
    }
</script>

History

  • 6th July, 2007: Initial post

License

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About the Author

meglio
Web Developer
Ukraine Ukraine
No Biography provided

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Comments and Discussions

 
GeneralMy vote of 4 Pin
amanalam14-Oct-10 3:04
memberamanalam14-Oct-10 3:04 
QuestionDoesn't work? Pin
Ben Adler14-Sep-10 7:52
memberBen Adler14-Sep-10 7:52 
Generalserver iframe Pin
Pavel Yermalovich10-May-10 11:16
memberPavel Yermalovich10-May-10 11:16 
Generalrunat="server" Pin
Pavel Yermalovich10-May-10 11:09
memberPavel Yermalovich10-May-10 11:09 
Generalrunat="server" Pin
Pavel Yermalovich10-May-10 11:06
memberPavel Yermalovich10-May-10 11:06 
GeneralOnly IE Pin
DanGetz22-Aug-09 20:47
memberDanGetz22-Aug-09 20:47 
GeneralI had to make a change for IE8 Pin
DanGetz22-Aug-09 19:55
memberDanGetz22-Aug-09 19:55 
GeneralGreat Job Pin
Member 39633857-Jul-09 5:09
memberMember 39633857-Jul-09 5:09 
GeneralDoesn't get smaller Pin
pinow17-Apr-09 0:45
memberpinow17-Apr-09 0:45 
The iframe keeps the height of the biggest page loaded.

Example:
So if the first page is 800px high, then the iframe also becomes 800px.
But if the second page is only 400px then the iframe remains 800px.

Hope you can help me with this.


Btw: I also had to replace "offsetHeight" with scrollHeight to get it to work in IE7.
Generalfunction improvement Pin
lanello9-Mar-09 2:19
memberlanello9-Mar-09 2:19 
GeneralSmall Typo Pin
The JZ28-Oct-08 8:17
memberThe JZ28-Oct-08 8:17 
Generalissue Pin
_test_123_16-Jul-07 22:35
member_test_123_16-Jul-07 22:35 
GeneralRe: issue Pin
meglio16-Jul-07 23:29
membermeglio16-Jul-07 23:29 

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