To use <s:select> tag inside a <td> for a proper dropdown use theme="simple" code example

Example: To use tag inside a for a proper dropdown use theme="simple"

<td><s:select class='js-example-basic-single'
	 theme="simple" list='busStopNo' id='textStopNo'
 name='textStopNo' cssStyle="width:120px;">
 </s:select></td>