rem: if (window.frames["messagepane"].location != "about:blank") window.frames["messagepane"].location = "about:blank";  
add: if (GetMessagePaneFrame().currentURI != "about:blank") GetMessagePaneFrame().loadURI("about:blank");  
context: function ClearMessagePane(){	if(gHaveLoadedMessage)	{	    gHaveLoadedMessage = false;		gCurrentDisplayedMessage = null;		if (window.frames["messagepane"].location != "about:blank")		    window.frames["messagepane"].location = "about:blank";		// hide the message header view AND the message pane...		HideMessageHeaderPane();	}}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/9d1c6443d97de14d412d127cdd5a8f56ee380956/msgMail3PaneWindow.js/clean/mailnews/base/resources/content/msgMail3PaneWindow.js