function Purpose(id, name_eng, name_chi, desc_eng, desc_chi){
	
	if ( arguments.length >= 5 )
		this.init(id, name_eng, name_chi, desc_eng, desc_chi);
}


Purpose.prototype.init = function(id, name_eng, name_chi, desc_eng, desc_chi){

	this.id = id;
	this.name_eng = name_eng;
	this.name_chi = name_chi;
	this.desc_eng = desc_eng;
	this.desc_chi = desc_chi;

};