How to select all friends in Facebook with a simple code ?

On the left hand side of your screen, you will see an option that reads "Suggest to Friends" 
Click "Suggest to Friends" 
A pop up screen should appear with a list of your friends. 
Paste the following code into the URL and press ENTER

javascript:elms=document.getElementById('friends').getElementsByTagName('li');for(var fid in elms){if(typeof elms[fid] === 'object'){fs.click(elms[fid]);}} 

All of your friends should be marked off (or highlighted) .


Now click Send invitations