Use Comma Separated Ids in Sql Query in IN statement

Hi

I need to select the records that having the list of ids in the table. (i.e) I need to select the records with the number "1,2",,I have writen the query as

SELECT * FROM tbl_Employee WHERE cast(IDas varchar) in (@Condition )

In this @Condition, I need to pass the Ids. Can any one help me in this issue.

Thanks