Web dropdownlist: when select item, the select area don`t grow. only IE8

I got a select开发者_如何学编程, in which the select area don't grow automathicatly. In chorme, and firefox does.

How can I fix it?

IE case:

Chrome case:

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Take a look at this article here. It's a problem with IE and you basically have to fix it with javascript.

For a similar question with answer (and code) check this StackOverflow post.

And for good measure... here is a jQuery plugin meant to solve just this issue in IE 6/7/8.