rem: var windowManager = Components.classes['@mozilla.org/appshell/window-mediator;1'].getService(); 
add:  if (uri in window) return; 
context: function toOpenWindowByType( inType, uri ){	var windowManager = Components.classes['@mozilla.org/appshell/window-mediator;1'].getService();	var	windowManagerInterface = windowManager.QueryInterface(nsIWindowMediator);	var topWindow = windowManagerInterface.getMostRecentWindow( inType );		if ( topWindow )		toOpenWindow(topWindow);	else		window.open(uri, "_blank", "chrome,extrachrome,menubar,resizable,scrollbars,status,toolbar");}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/62082970ad4e03463b2fc06fd46a226c7269a7a4/tasksOverlay.js/buggy/suite/common/tasksOverlay.js