I think you can get dimensions of <div>, dimensions of <p>, their positions, and than calculate if <p> is overflowed.
- [jQuery] Determining visible elements in an overflowed d... spaceage
- [jQuery] Re: Determining visible elements in an ove... Andrew Lysyuk
- [jQuery] Re: Determining visible elements in an... [EMAIL PROTECTED]
- [jQuery] Re: Determining visible elements in an ove... Alex Weber