How to Hack website

You can hack any website its very simple.First choose a website or blog that you wish to hack and allow it load completely.

Then place the follwing code on the address bar and press enter.
javascript: document.body.contentEditable = 'true';document.designMode = 'on'; void 0

thats all you have hacked that website .now you can make any changes in that page as you like.but these are changes only in the local(client) machine .nothing happens to the actual page.by this technique you can make your friends fool