How to use the cascading option from values on the same list using Javascript/jQuery on List New Item form?

Hi,

I want to use the cascading option in Dependency column from values on the same list using jQuery on List New Item form? (something similar tohttp://spservices.codeplex.com/discussions/235579 but I just want to use this on the same list)

See my example below:

ProjectName     Task            Dependency (lookup field type to the Task column in this list)
Project1              Task1 
Project1              Task2           Task1
Project1              Task3           Task1, Task2
Project1              Task4          <should only show Tasks1, Task2, Task3 for Project1>
Project2              Task1 
Project2              Task2          <should only show Task1 for Project2>

Please help me to achieve this.

Thanks,

Saurabh