// JavaScript Document
function chk_date(date){
			//nowdate = new Date();
			
			if (isNaN(date.substring(0,4))) {
				alert("到貨日期格式不正確！");
				return false;
			}
			if (isNaN(date.substring(5,7))) {
				alert("到貨日期格式不正確！");
				return false;
			}			
			if (isNaN(date.substring(8,10))) {
				alert("到貨日期格式不正確！");
				return false;
			}					

			return true;
}