add:   document.getElementById( "only-workday-checkbox-1" ).removeAttribute( "disabled" ); document.getElementById( "only-workday-checkbox-2" ).removeAttribute( "disabled" );  
context: MonthView.prototype.switchTo = function monthView_switchTo( ){   // see showingLastDay notes above      this.showingLastDay = false;         // disable/enable view switching buttons         var weekViewButton = document.getElementById( "week_view_command" );   var monthViewButton = document.getElementById( "month_view_command" );   var dayViewButton = document.getElementById( "day_view_command" );      monthViewButton.setAttribute( "disabled", "true" );   weekViewButton.removeAttribute( "disabled" );   dayViewButton.removeAttribute( "disabled" );   // switch views in the deck      var calendarDeckItem = document.getElementById( "calendar-deck" );   calendarDeckItem.selectedIndex = 0;}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/aa16cc7da9b1ccb4d128fa79d186b2696dc89725/monthView.js/buggy/calendar/resources/content/monthView.js