Horizontal scroll bars in tables

Question

In the following code,

<table id=\"preview_table\" class=\"preview_table\" cellspacing=\"0\" border=\"1\" width=\"%s\"><tr  bgcolor=\"lightgrey\" width=\"%s\"><th>Category</th>
<th>Grade</th>
<th>Grade</th>
<th>Grade</th>
<th>Grade</th><th>Grade</th>
<th>Grade</th>
<th>Grade</th>
<th>Grade</th>
<th>Grade</th>
 <th>Grade</th>
 <th>Grade</th>
 </tr><tr><th></th>
<th></th><th></th><th></th><th></th><th></th><th></th><th></th><th></th><th></th><th></th></tr>
 </table>

In the above table how to fix the table width such that the horizontal scroll bar doesnt appear in the browser and the cells are equally aligned for what ever the size it has the contents

Thanks..