[Zope] how to query multiple catalogs using search button?

Hi, I want to query two different catalogs,"portal_catalog" and a "ZCatalog" using the search button in plone. I want to give the user a drop down menu from which user will select a value and enter the searchableText in the input box . After this when the user clicks the "Search" button the concerned catalog should be queried and the results should be displayed to users. Please help me to tackle this issue! WARM REGARDS VAIBHAV UPRETY ________________________________________________________________________ Yahoo! India Matrimony: Find your life partner online Go to: http://yahoo.shaadi.com/india-matrimony