how to display top 5 records in the table using function.

Question

how to display top 5 records in the table using function.?

i used this query but this query is not wrok on funtcion.
select top 5 * from tablename

using this function only 1 record are display.

alter function fn_TopStudentRecord  

(@name varchar(20))  

returns varchar(20)  

begin   

return (select name from Student1 where name=@name)  

end