rem:  if(event.currentTarget.calendarToDo) 
add:  var HolderBox; if("calendarToDo" in event.currentTarget) 
context: CalendarWindow.prototype.changeMouseOverInfo = function calWin_changeMouseOverInfo( calendarEvent, event ){   var Html = document.getElementById( "eventTooltip" );   while( Html.hasChildNodes() )   {      Html.removeChild( Html.firstChild );    }      if(event.currentTarget.calendarToDo)    {     var HolderBox = getPreviewTextForTask( event.currentTarget.calendarToDo );   }   else      {   var HolderBox = getPreviewTextForRepeatingEvent( event.currentTarget.calendarEventDisplay );      }      Html.appendChild( HolderBox );}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/21ec71224a3178e257ac8372f6236b9d0a52ecc2/calendarWindow.js/buggy/calendar/resources/content/calendarWindow.js