[tex-live] In natbib, how to exclude content of url field in the bib section

[Lianqing Yu]

I use bibliographic database and \thebibliography environment to create the reference section of my papers. In each bibliographic entry in the database, I usually add a url field. When I use bibtex, the content of the url field is not shown in the paper. This is fine. However, when I use natbib, the content of the url field is shown in the paper. This is not desirable but I have to use natbib for its author-year style. So my question is: how to configure natbib so that the the content of the url field is not shown in the paper?
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