function Property(questionID,drinkID,typeID,drinkType){
	this.QuestionID = questionID;
	this.DrinkID = drinkID;	
	this.TypeID = typeID;
	this.DrinkType = drinkType;
	function toString(){
		return questionID+","+drinkID+","+typeID+","+drinkType;
	}
	this.ID = questionID+':'+drinkID;
	this.ToString = toString;
}