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When I save it and run it locally, your ads are visible. When I view your live site they are not. I'm using Firefox 3 by the way, so unfortunately we can add that one to the list.<br />
<br />
Try commenting out everything on the page that is not relevant. Strip it down to just what you need for the ads to run. Verify that the ads run, then start turning elements back on, one by one until something breaks.
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<div>
Before you do anything, try a different doctype. See if it works with an html4 DocType:<br />
<br />
&lt;!DOCTYPE html PUBLIC &quot;-//W3C//DTD XHTML 1.0 Transitional//EN&quot; &quot;<a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" rel="ugc">http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd</a>&quot;&gt;<br />

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I really want it to work in HTML5 if I can but I'll try the more normal doctype. &nbsp;I know the ads are loading on all the browsers, it's just that the center DIV is laying on top of all the other DIV's on the left and right.<br />
<br />
I could use z-index but that's got other problems.<br />
<br />
Give me a few hours here. &nbsp;<br />
<br />
Thanks in advance.
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<div>
Per link below, I changed it over to HTML 4.01 Transitional and it certifies as error-free and still, the center DIV is on top of all the other DIV's on the page. &nbsp; Dang.<br />
<br />
<a href="http://validator.w3.org/check?uri=http%3A%2F%2Fwww.zipcodetable.com%2F" rel="ugc nofollow">http://validator.w3.org/check?uri=http%3A%2F%2Fwww.zipcodetable.com%2F</a><br />

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<div>
I tried it in simplified HTML and it works fine (see attached HTML below). &nbsp;I'm starting to wonder if this issue has something to do with the iframes Google is using with their advertising (see link below).<br />
<br />
<a href="http://adsense.blogspot.com/2011/03/making-web-faster-for-all-adsense-for.html" rel="ugc">http://adsense.blogspot.com/2011/03/making-web-faster-for-all-adsense-for.html</a><br />
<br />

<pre><code class="code-10 nolinks" id="code-8168449"><span>&lt;html&gt;</span>
<span>&lt;body&gt;</span>
<span>&lt;div style=&quot;position:absolute;top:0px;left:0px;width:160px;background-color:#FFF; border-top: 1px none #FFF;border-right: 1px none #FFF;border-left: 1px solid #FFF;border-bottom:1px solid #FFF;&quot;&gt;</span>
<span>Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 </span>
<span>&lt;/div&gt;</span>
<span>&lt;div style=&quot;background-color:#FFF; vertical-align:top;margin:0px 162px 0px 162px; min-width:300px;&quot;&gt;</span>
<span>Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 Column 2 </span>
<span>        &lt;div style=&quot;position: relative;text-align:left;padding-bottom: 64px;&quot;&gt;</span>
<span>            sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 sub-column 2 </span>
<span>        &lt;/div&gt;  </span>
<span>&lt;/div&gt;</span>
<span>&lt;div style=&quot;position:absolute;top:0px;right:0px;width:160px;background-color:#FFF; border-top: 1px none #FFF;border-right: 1px none #FFF;border-left: 1px solid #FFF;border-bottom:1px solid #FFF;&quot;&gt;</span>
<span>Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 Column 3 </span>
<span>&lt;/div&gt;</span>
<span>&lt;div id=footer style=&quot;width:728px;margin:0px 162px 0px 162px;margin-left:auto; margin-right:auto;text-align:middle;&quot;&gt;</span>
<span>Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer Footer </span>
<span>&lt;/div&gt;</span>
<span>&lt;/body&gt;</span>
</code></pre>
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Dang it, yep, that's it. &nbsp;I removed the JavaScript and put dummy data in its place and the dummy data shows up just fine.<br />
<br />
How do I get around this???????????
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<div class="content wysiwyg-content">
The page at the link be shows Google ads just fine in Firefox 4 but IE9, Chrome, Opera don't display/render the ads (although the Adsense scrips are being downloaded in each of these browsers). &nbsp;What are we doing wrong?<br />
<br />
<a href="http://www.zipcodetable.com/" rel="ugc">http://www.zipcodetable.com/</a>
</div>
</div>


The page at the link be shows Google ads just fine in Firefox 4 but IE9, Chrome, Opera don't display/render the ads (although the Adsense scrips are being downloaded in each of these browsers).  What are we doing wrong?

http://www.zipcodetable.com/

CSS Positioning &gt; Google Adsense

Cascading Style Sheets (CSS) is a language used for describing the look and formatting of a document written in a markup language. Usually used to change web pages and user interfaces written in HTML, it can also be applied to any kind of XML document. CSS is designed primarily to distinguish the content of a document from its presentation.

HTML (HyperText Markup Language) is the main markup language for creating web pages and other information to be displayed in a web browser, providing both the structure and content for what is sent from a web server through the use of tags. The current implementation of the HTML specification is HTML5.

CSS Positioning &gt; Google Adsense

CSS Positioning > Google Adsense