Passing date selection to stored procedure

I have 2 drop down lists, where i bind the data using web service from sql server database .
Now in the front end i can see the data in the drop down list.
Here is the procedure that i bind the data in 2 drop down list - start date and end date

Alter procedure dbo.Dates
select top 100 Desc as start date , Desc as end date from dbo. DateSelection

data looks like this in the frontend Example -
Start date end date
Wk 1 Jan 2010 Wk1 jan 2010
Wk 2 Jan 2010 Wk2 Jan 2010

Now the question is what ever dates i have selected in the drop down how can i pass this selection to below procedure where it has logic to filter.

Idea is Employee Id's which are selected in the front end will look like this
64747,84747,95858 etc....
on clicking on the Move button it will ask to select date parameter selection start date and end date..

I am trying to figure out how to pass date selection to the below procedure as well as Employee Id selection to below procedure..

ALTER PROCEDURE dbo.Employee
(
@IdList NVARCHAR(3500)
)

DECLARE
@SqlStatement NVARCHAR(4000) =
N'
INSERT INTO #Employee
(
EmployeeId
)
SELECT
EmployeeId
FROM
dbo.Employee
WHERE
EmployeeId IN (' + @IdList + N');
';

IF ( OBJECT_ID('tempdb..#Employee') IS NOT NULL )
DROP TABLE #Employee;

CREATE TABLE #Employee
(
EmployeeId INTEGER NOT NULL
)

EXEC ( @SqlStatement )

DROP TABLE #Employee;

RETURN;
END