log file to be reduced

Hi All
I have a mdf file of around 4gb but log file increased to
20gb. how to reduce size of log file.
Any help would be highly appreciated.
Rgds
TriveniHave a look at these articles.
INF: How to Shrink the SQL Server 7.0 Transaction Log
http://support.microsoft.com/defaul...kb;en-us;256650
INF: Shrinking the Transaction Log in SQL Server 2000 with DBCC SHRINKFILE
http://support.microsoft.com/defaul...kb;en-us;272318
http://www.mssqlserver.com/faq/logs-shrinklog.asp
Hope this helps
John