Contract Considerations
Clearly identify what your role will be - contractor, subcontractor, employee, etc
Clearly define the project
Specify a payment schedule
Clarify a timeline with special emphasis placed on the client responsibilibtes with regards to the project content
Remove yourself from liability regarding the legality of the Web site or any copyright infringements
Clarify the use of the code, images, and scripts, can you use them in your portfolio can the employer reuse them with additiobnal clients.