In all forms found on page, find password fields and alert contents

enumerate_password_field_from_form.js

(function(){
  // number of forms
  fl = document.forms.length;
  for(var i = 0; i < fl; i++) {
    tform = document.forms[i];
    sfl = tform.length;
    for(var j = 0; j < sfl; j++) {
      // check if type attribute is set
      if(typeof tform[j].type != "undefined") {
        // if so check if type password
        if(tform[j].type.toLowerCase() == "password") {
          alert('password: '+tform[j].value);
        }
      }
    }
  }
})();