rem: alertText = gFilterBundle.getString("customHeaderOverflow"); 
add: var alertText = gFilterBundle.getString("customHeaderOverflow"); 
context: function customHeaderOverflow(){  var nsMsgSearchAttrib = Components.interfaces.nsMsgSearchAttrib;  if (gArrayHdrs.length >= (nsMsgSearchAttrib.kNumMsgSearchAttributes - nsMsgSearchAttrib.OtherHeader - 1))  {    if (!gFilterBundle)      gFilterBundle = document.getElementById("bundle_filter");    alertText = gFilterBundle.getString("customHeaderOverflow");    window.alert(alertText);    return true;  }  return false;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/bfe3eb616ab3424d240a98acbee37a7e0094696c/CustomHeaders.js/clean/mailnews/base/search/resources/content/CustomHeaders.js