SQL Next business Day Function

-- get next business day  
-- assumption: first day of the week is Sunday  
CREATE FUNCTION NextBusinessDay
               (@date DATETIME)
RETURNS VARCHAR(12)
AS
  BEGIN
    DECLARE  @date1 DATETIME,
             @m     INT
    SELECT @date1 = @date,           @m = 0
    WHILE @m < 1
    BEGIN
      SET @date1 = DATEADD(DD,1,@date1)

/*  ** the following line checks for non-business days (1 and 7)  
 ** IF your business days are different, change the following line to   
 ** comply with your schedule   
 */
      IF DATEPART(DW,@date1) NOT IN (1,7)
        BEGIN
          SET @m = @m + 1
        END
    END

    RETURN CAST(@date1 AS VARCHAR(12))
  END