Used to check all checkboxes in a page.

check_all.js

// Paste into Firebug or Chrome Dev Tools console
// when viewing a page with multiple checkboxes.

(function(d) {
  var input = d.querySelectorAll('input[type="checkbox"]');
  var i = input.length;

  while (i--) {
    input[i].checked = true;
  }
})(this.document);

I can't get either one of these scripts to work in Firebug Lite or Chrome's Dev Console. I'm actually trying to do the opposite and uncheck all checkboxes on pages that don't have an check/uncheck all. i.e. Facebook's notification page. http://cl.ly/2R2U1m1w392n2S2K0z3S Any ideas?

@kevinSuttle - This is what you need...

(function(d) {
  var input = d.querySelectorAll('input[type="checkbox"]');
  var i = input.length;

  while (i--) {
    input[i].checked = false;
  }    
})(this.document);

ROCK! Thanks Nathan!

Just used this on a shady recruiter. The first snippet works best.

Thanks! @nathansmith