add:  this.mTagListBox = document.getElementById('tagList'); this.buildTagList(); 
context:   init: function ()  {    var preference = document.getElementById("mail.preferences.display.selectedTabIndex");    if (preference.value)      document.getElementById("displayPrefs").selectedIndex = preference.value;      // build the charset menu list. We do this by hand instead of using the xul template      // builder because of Bug #285076,       this.createCharsetMenus(document.getElementById("viewDefaultCharset-menupopup"), "NC:DecodersRoot",                              document.getElementById('mailnews.view_default_charset').value);    this.mInitialized = true;  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/ea783e56c0801ba861c5e3a9e35b1dc481f9de2f/display.js/clean/mail/components/preferences/display.js