You are attempting to use an inline style inside your HTML tags. First off, I recommend quotes around your units of measure like so. <th width="100"></th>
Also, you arent defining the units of measure of the tags. you can use: <th width="100px"></th>
or <th width="100%"></th>
i think that you can even do inches and centimeters. Be careful when using the inline style `length' as the webpage is limitless....
Another way you can do this is using CSS. Inside your head tag could be a <style>
tag.
Inside you can do:
.measure { width:100px; }
Note it doesn't have to be pixels. Then on any tag you want 100px wide, you just do:
<th class="width"></th>
or <tr class="measure"></tr>
. Hope this helps!