How to validate selects

[Frank Schaare <lo...@gmx.de>]

Hi all,

i´m doing some selects like this:
<html:select property="foo">
   <html:option key="please select" value="null"/>
   <html:optionsCollection name="foo" property="bar"/>
</html:select>

Now, i have to validate, that the user has made his choice, which means 
that the 'foo' property is notNull.

Does anyone have an idea how to realise this in struts ?

Thanks

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