Postal Code Search

I need somebody to script a postal code search to return db results within 10 km

I have a databse with all canadian postalcode with their respective lat and lon. my second database has my client, ex: name address phone ext..

I am using ASP javascript (not vb) and would need somebody to script it for me.

I have no idea where to begin.

The way it is set up now, is the search page looks for direct relation to the posttal code within the database. these results are not accurate enough.

any help would be appreciated.