T-SQL (SS2K8) :: Finding Rows From CSV Column With CSV Parameter

I have a split string function that will take a comma delimited string and give back a table with all the values.I have a table that has a column with a comma delimited comma delimited list of states.

I can use a where clause to find one state in the table (such as all records that have CA in the states string).But need to find out how to find all the rows that have all or any of the states from a comma delimited parameter.Here is the schema

CREATE FUNCTION [dbo].[split] (@list nvarchar(MAX))
RETURNS @tbl TABLE (svar nvarchar(10) NOT NULL) AS
BEGIN
DECLARE @pos int,
@nextpos int,
@valuelen int

[code]....