Well actually there is no real hacking instead we use simple java script to edit web site content . Go your target web page and
Copy and paste below java script in you r web browser address bar
javascript: document.body.contentEditable =
'true' ; document.designMode ='on' ; void 0
Now you can edit , change any thing of the web page. As I said there is no real hacking. Original web page content never change. But you can get real fun with this. You can make you r friends fool by editing there facebook , myspace ,hi5 profiles or adding their photograph on government defence web site or ………………….. . Have a FUn