Need a simple overlay or tooltip
<p>I need a tooltip or overlay to appear onmouseover and disappear onmouseout displaying the text thats inside the cell.  I can get the text out of the cell no problem.  How do i make that into a tooltip or overlay?  The problem is this needs to be extremely lightweight.  No JQuery library loads. Css can be javascript controlled so no css declarations other than javascript handling it.  Is there a way with a few lines of code to create some kind of box (background color would be nice if code kept small) that appears onmouseover with the cell text and disappears onmouseout?</p>

<pre><code>&lt;td onmouseover="this.value; what else here?"&gt;
</code></pre>
