add: if ((document.getElementById('prefname').value == "browser.startup.homepage") && (document.getElementById('prefvalue').value.length > 0)) { gPromptService.alert(window, "", "You cannot set the browser.startup.homepage here, you can only lock it."); return false; } 
context: function OnPrefOK(){  listbox = this.opener.document.getElementById('prefList');  var listitem;  if (window.name == 'newpref') {    listitem = listbox.appendItem(document.getElementById('prefname').value, document.getElementById('prefvalue').value);  } else {    listitem = listbox.selectedItem;    listitem.label = document.getElementById('prefname').value;    listitem.value = document.getElementById('prefvalue').value;  }  if (document.getElementById('lockPref').checked) {    listitem.cck['lock'] = "true";  } else {    listitem.cck['lock'] = "";  }}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/4c6e9230559c26dd0db3c0643d9a7bf3bc677b0f/cckwizard.js/clean/extensions/cck/browser/resources/content/cckwizard/cckwizard.js