Seeting Drop-Down box width

Hi,

I have a drop-down box for which I need to show 100 px when it's
rolled up. When the user expands it I want to display the whole
string (variable elngths, could be, sy up to 400 characters)

I did the following and it works perfectly in NS7.x I need this to
work in IE6...

<select name="soldto" style="width: 100px;">
<option value="1234" selected="selected" style="width: 100%;">11000001
SHRINERS HOSPITAL FOR CHILDREN EAST</option>
<option value="1235" style="width: 100%;">11000002 SHRINERS HOSPITAL
FOR CHILDREN WEST</option>
<option value="1236">Account No.1236</option>
<option value="1237">Account No.1237</option>
</select>

So, of course, I committed that this would work, since NS supports.
and now I'm desperate for help !

Thanks a lot, guys !