HTML content of an iFrame is rendered on top of the scrollbar in Internet Explorer

Applies to: Internet Explorer 9

Symptoms

Consider the following scenario. A webpage contains an iframe that has scrollbars. HTML content is displayed within the iframe. You notice that the content of the iframe gets rendered above the scrollbars if Internet Explorer is using Quirks mode as the document mode.

Cause

Microsoft has confirmed that this is a problem in the products listed in the Applies-to section of this article.

Resolution

Use Internet Explorer 8 or Internet Explorer 9 Standards mode to render the page instead of using Quirks mode.

More Information

This issue only happens if the page is using either no document type declaration or a faulty document type declaration. This puts the browser into Quirks mode. Quirks mode is following non-standard rules introduced with Internet Explorer 5.5 and is still available for compatibility with legacy web pages. 

Microsoft recommends using the latest available Standard mode to render HTML pages.