Javascript with ASP.Net : Use Javascript to iterate through a gridview and find checkbox in each row

I was looking for a mechanism to iterate over a gridview using Javascript. I had to get the checkbox in each row and update that checkbox's checked status according to the corresponding header columns checkbox's status.

Just after googling a little bit , I found exactly what I was looking for. The following link has done the same thing. Have a look at this:

http://www.codeproject.com/KB/grid/GridCheckBox.aspx

** I believe when there are so many quality tutorials over the web, I do not really need to write one of my own unless the topic is something unique**