How to Compare pdf contents of two pdfs?

Hi,

Can anyone guide me how can i do content comparision of pdf at run time. I am able to compare documets using acrobat and get the results. But I have a scenario where i need to compare two documents at runtime.

Can assembler compare two documents and Highlight the contents? or

Is there any JavaScript API which can perform pdf content comparision?

Please help me on this?

Regards

Sunil