Javascript for clicking on all subscribe buttons on a Reddit page. Display multiple sub-reddits using this format: http://www.reddit.com/r/4sentencemoviereviews+7films+<other sub-reddits>. Run this script to subscribe to all those sub-reddits at one go from console or from address bar using the prefix "javascript:".

reddit-subscribe-all.js

e=document.getElementsByClassName('add');
var i = 0,n = e.length;

function f() {
    if(e[i].className.indexOf('active')>=0) e[i].click();
    i++;
    if( i < n ){
        setTimeout( f, 3000 ); //Time out required for registering subscribe on the servers
    }
}

f();