rem: var button = document.getElementById("changeMasterPassword"); button.disabled = noMP; 
context:   _initMasterPasswordUI: function ()  {    var noMP = !this._masterPasswordSet();    var button = document.getElementById("changeMasterPassword");    button.disabled = noMP;    var checkbox = document.getElementById("useMasterPassword");    checkbox.checked = !noMP;  },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8395/03a713b38bd3cfdd22e1f4350b93361883f69937/security.js/clean/browser/components/preferences/security.js