rem: gMessagePaneFrame = top.frames['messagepane']; 
add: gMessagePaneFrame = document.getElementById("messagepane"); 
context: function GetMessagePaneFrame(){    if (gMessagePaneFrame) return gMessagePaneFrame;    gMessagePaneFrame = top.frames['messagepane'];    return gMessagePaneFrame;}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/9d1c6443d97de14d412d127cdd5a8f56ee380956/msgMail3PaneWindow.js/clean/mailnews/base/resources/content/msgMail3PaneWindow.js