add: if (locked) broadcaster.setAttribute("disabled","true"); 
context: function setupBiffUI(){    var broadcaster = document.getElementById("broadcaster_doBiff");   var checked = document.getElementById("server.doBiff").checked;   if (checked)     broadcaster.removeAttribute("disabled");   else     broadcaster.setAttribute("disabled", "true");}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/4908a3ccdc3d63b456643d07405cd5bdb98600be/am-server.js/clean/mailnews/base/prefs/resources/content/am-server.js