Online Time card

Hello I need an online timecard system for my employees. I have had a developer working on it but suddenly left without notice. It has to be: 1. Web based 2. Accessible only to people with a specific IP address. 3. Has an interface where employees can log in/log out. The system should be able to record log in/log out times of employees AND compute billable time. 4. Shifts can be set by me. Hours can only be billed during the shift; however employees can log in any time they want. Please make sure to include the word COPY to ensure that you have read the ad properly. Happy bidding.