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    <p>I did some tests in Firefox 3 comparing the value of <code>.src</code> and <code>.documentWindow.location.href</code> in an <code>iframe</code>. (Note: The <code>documentWindow</code> is called <code>contentDocument</code> in Chrome, so instead of <code>.documentWindow.location.href</code> in Chrome it will be <code>.contentDocument.location.href</code>.)</p> <p><code>src</code> is always the last URL that was loaded in the iframe without user interaction. I.e., it contains the first value for the URL, or the last value you set up with Javascript from the containing window doing:</p> <pre><code>document.getElementById("myiframe").src = 'http://www.google.com/'; </code></pre> <p>If the user navigates inside the iframe, you can't anymore access the value of the URL using src. In the previous example, if the user goes away from www.google.com and you do:</p> <pre><code>alert(document.getElementById("myiframe").src); </code></pre> <p>You will still get "<a href="http://www.google.com" rel="noreferrer">http://www.google.com</a>".</p> <p><code>documentWindow.location.href</code> is only available if the iframe contains a page in the same domain as the containing window, but if it's available it always contains the right value for the URL, even if the user navigates in the iframe.</p> <p>If you try to access <code>documentWindow.location.href</code> (or anything under <code>documentWindow</code>) and the iframe is in a page that doesn't belong to the domain of the containing window, it will raise an exception:</p> <pre><code>document.getElementById("myiframe").src = 'http://www.google.com/'; alert(document.getElementById("myiframe").documentWindow.location.href); Error: Permission denied to get property Location.href </code></pre> <p>I have not tested any other browser.</p> <p>Hope it helps!</p>
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    1. POHow do I get the current location of an iframe?
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    1. USFabrício Matté
    1. USJoaquin Cuenca Abela
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    1. CODoesn't work in IE 8 and Chrome 11
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      1. USbilly
    2. COThanks for the heads up billy, I updated the answer with instructions on how to access the href in Chrome. I have not tested any other browser.
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      1. USJoaquin Cuenca Abela
    3. COCan you help me? If i use `document.getElementById("myiframe").src`, i get the initial state, no matter if src is on my domain or not. And if i use `document.getElementById("myiframe").documentWindow.location.href` i get a `TypeError: document.getElementById("myiframe").documentWindow is undefined` Do you have any idea why i can get a TypeError?
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      1. USNikolay
 

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