rem: return document.getElementById("content").webNavigation; 
add: return getPPBrowser().webNavigation; 
context: function getWebNavigation(){  try {    return document.getElementById("content").webNavigation;  } catch (e) {    return null;  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/a4f9e1af6934a96549a97f99973bbe5d87847168/msgPrintEngine.js/clean/mailnews/base/resources/content/msgPrintEngine.js