rem: optionalFields[fieldName][FIELD_USED] = false 
add: optionalFields[fieldName]['used'] = false 
context: function removeField (event){	if (confirm ("Are you sure you want to remove this field?")) {		var id		var mainDiv = document.getElementById ("mainDiv")		if (event.target) {			id = event.target.id		} else {			id = event.srcElement.id		}		fieldName = lessonPlan.fields[id].fieldName		if (optionalFields[fieldName])			optionalFields[fieldName][FIELD_USED] = false		mainDiv.removeChild (lessonPlan.fields[id])		delete lessonPlan.fields[id]	}}
meta: 4793	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4793/cb81ced60c4a7353d1a8b7619cd6ff102c22c261/lesson_plan.js/clean/teaching_boxes/web/scripts/lesson_plan/lesson_plan.js