function PF_Lg(str){
	switch (str){
		case "未填":
			return 'is Empty';
		 	break;
		case "請勾取其一":
			return 'Please choose';
			break;
		case "格式錯誤":
			return 'not carrect';
			break;
		case "請輸入數字":
			return 'Please enter numbers';
			break;		
		case "長度必須在4到15個字元﹝英文字母或任一數字均算一個字元，請勿使用空白鍵﹞":
			return "4 to 15 characters can contain only small letters, numbers, or underscores( _ ) example: jos_25asef."
			break;		
		default:
			return str
			break;
		
	}	


}