Bootstrap tips
How to make form elements fluid
create a <div> container with the class "row-fluid"
put a "span" class on the form element (span12 is full-width, span1 is 1/12 of 100%)
Example:
<div class="row-fluid">
<select class="span6"> <!-- this means half-width of the container -->
<option>...</option>
<option>...</option>
</select>
</div>