Date field validation

Dear all,
I am entering date data into a text input. I would like to validate the date entered. The date can be in the following formats.
dd/mm/yyyy
dd/mmm/yyyy
How does one do this validation through Javascript.
Code snippets for date validation would help a lot.
Thanks in advance.

Without going into much detail on my end, try going to:

http://javascript.internet.com/forms/val-date.html

This is a particuarly good example, but they may have others as well.

Thanks fella. Thank you very much for your Realistic solution.