Here is a 3×3 table:
<html>
<body style="overflow:hidden;">
<style>
div.table_div {overflow:scroll;width:378px;height:117px;position:relative;}
table.TheTable {width:361px;height:100px;table-layout:fixed;border-collapse:collapse;border:1px solid #000000;}
td.TheTableColumnCell {font-size:16px;line-height:14px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap;border:1px solid #000000;}
</style>
<div class="table_div" id="table_div">
<table class="TheTable">
<tr id='firstTr'>
<td class="TheTableColumnCell">
<div onclick="alert('1');" style="position:absolute;font-size:16px;line-height:14px;background-color:#FFFF00;left:0px;top:4px;width:60px;height:24px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap;">Event: 1</div>
<div onclick="alert('2');" style="position:absolute;font-size:16px;line-height:14px;background-color:#FFFF00;left:90px;top:4px;width:30px;height:24px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap;">Event: 2</div>
<div onclick="alert('3');" style="position:absolute;font-size:16px;line-height:14px;background-color:#FFFF00;left:150px;top:4px;width:210px;height:24px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap;">Event: 3</div>
</td>
<td class="TheTableColumnCell"> </td>
<td class="TheTableColumnCell"> </td>
</tr>
<tr>
<td class="TheTableColumnCell">I'm</td>
<td class="TheTableColumnCell">Vertically</td>
<td class="TheTableColumnCell">Aligned Middle!</td>
</tr>
<tr>
<td class="TheTableColumnCell"> </td>
<td class="TheTableColumnCell"> </td>
<td class="TheTableColumnCell"> </td>
</tr>
</table>
</div>
</body>
</html>
If you cut-and-paste that code into an html file and open it in your browser, you will see that the div’s act as an overlay onto my grid. This is sort-of like a Scheduling control (the grid represents each hour block).
The thing that’s driving me crazy is that the I can’t get the text inside the div tags to become vertically aligned in the middle. The actual td tags, no problem. But the div tags inside the td tag – nope!
I’ve read and tried everything here: http://phrogz.net/css/vertical-align/index.html
I’ve tried (as a style for the div): padding, margins, line-heights, etc.
EDIT: I think there is some confusion on the intent of this grid. The reason I use the div tags is to overlay “the yellow bar” over the grid. That means there could be multiple “yellow bars” inside of one td cell or it can span multiple cells. For example, my original html (assuming the first column is 12:00 AM) has three events in that first row. Event 1: 12:00 AM – 12:30 AM. Event 2: 12:45 – 1:00 AM (both in the same cell). Event 3: 1:15 AM – 3:00 AM (and it has overlapped two cells). Stuff like that. That’s why the div tags.

Is there a single line in the div, try setting the line-height of the container to the same as the height of the container.