Hello Ahmed,
for clients to be able to connect to the Internet you need a router that performs NAT network address translation.
NAT is not supported on switch (unless you have a Catalyst 6500)
If you have a router connected to the Internet you should look at the NAT Commands in the router in order to modify them to include the IP subnet of wireless clients
Example:
ip nat inside source list 11 interface fa0/0 overload
access-list 11 must contain a line for the IP subnet of the wireless users like the following:
access-list 11 permit 10.0.0.0 0.0.0.255 ! wired users
access-list 11 permit 10.0.10.0 0.0.0.255 ! wireless users
Hope to help
Giuseppe