Question aboud Headings For Professionals <H1>... <H9> in SEO & Browsercompatibility Differences

Posted by Sam on Pro Webmasters See other posts from Pro Webmasters or by Sam
Published on 2010-12-22T16:43:38Z Indexed on 2012/06/11 22:47 UTC
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We all know the importance ans significance of Headings for Professional Webmasters. These were known for professional developers as <h1>Heading 1</h1> h2 ... h6.

As a daring webdeveloper I lately needed more short headings for complex structured document and i thought what the hell and went ahead and used in css

h1,h2,h3,h4,h5,h6{ }

h7{ }
h8{ }
h9{ }

My experiment turned out to pay back. But only in Firefox, Safari, Chrome etc, not in Internet Explorer 8.

Q1. Who(&When) decided that All headings should go upto h6, and not h4 or h7?
Q2. Why h7 -h9 work perfect in all major browsers, except IE8?
Q3. What is the significance for Bing,Yahoo and Googld in terms of recognition or headings h1 ~ h9? obviously h1 is more important than 2, but do they differentiate between h5 and h6? or not anymore after h3?

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