how can I apply for PAN online??

Click this and follow the instructions...

Pan cards - PAN Card Application

It is very simple.

Fill in the form - basic details is what they ask it must not be a big problem

Then pay the amount

Take a print out of it, Paste your photo and also dont forget to sign the application (IN BLACK INK)

Then attach the documents. Best document would be your passport or a letter signed from a gazetted officer.

Send it to the address mentioned

Regards