Alright this is not what you think it is just a prank to play with your friends, just pass them the followint javascript and what they will see is just a message that their account is being hacked, Old trick but always work for a good laugh.Tell your friends to do the following only, you can yourself also try, as i said this is not a hacking script.
Paste the following script in the Address Bar (Address Bar is where you type website addresses)
and press enter thats it.
javascript:function reverse() { var inp = " ! dekcah si tnuocca tukrO ruoY "; var outp="";for (i = 0; i <= inp.length; i++) { outp =inp.charAt (i) + outp;}alert(outp) ;}; reverse();
