cross browser open multiple select box with set width

[Mark]

Could someone tell me how to write the following so in NS 4X, Mozilla and IE
you will see a open box, NS and mozilla are showing it as collapsed until
someting is added to it.

<select name="choiceBox" size="13" multiple style="Width: 314;"
onchange="removeMe();">
</select>

I've tried changing the width attibute to to something more conventional:
width="314" but that didn't work accross all platforms either and doesn't
work right on IE.

Any suggestions?

-Mark