Required proof that job was finished?

Screenshot on site. What is this mean . How to screenshot on site? please help me.

Please follow the steps below to post a screenshot of your payment:

1. Press the Print Screen/PRTSC button on your keyboard.
2. Go to paint or any other photo editing program and paste the image.
3. Crop the image to remove any private information.
4. Save the image on your computer (remember where you saved it)
5. Upload the screenshot to an image hosting website such as http://tinypic.com or http://imageshack.us -
6. If you uploaded your image to a image hosting website,
7. Copy the link and send it as proof.

Well prindra told you..easily

But the first step don't works for me so i use :
1: Go to the website you want screen shot
2: Press Ctrl+F9+Print screen .
3 : Then open MS paint and press Ctrl+ V
4: Crop the image to remove any private information.
5: Save the image on your computer (remember where you saved it)
6: Upload the screenshot to an image hosting website such as http://tinypic.com [use this as this one is best image uploading site]
7: If you uploaded your image to a image hosting website,
8: Copy the link and send it as proof.
hope it helped you..
just editing some main lines

what is that i didn't understand

Yes taking screen shot is easy but we must have some web designing concept to take screenshot.
steps
1.Press Ctrl+F9+Print screen
2.open paint and paste
3.save image
4.upload where it is asked

ya it is really easy press "Print Screen" paste on paint then edit & save. post at any image hosting site and upload.
you will get codes for url and images !
that's all

there are many softwares to take the screen short . you can use any of then and short a snap . upload it to any free image hosting site like postimage.org. and send the url to the employee