help in javascript

hi, cn someone give me an exmple on how to create 'select' webform using javascript..

outputscript:
ex (<select name='na_name'>
<option>sample1</option>
<option>sample1</option>
</select>)

then i want to pass that script in div as innerHtml:
<div id='dv'> </div>

ex.. document.getElementbyId(dv).innerHtml = outputscript

thnx..