function updatePayMchOrderNo() {
			payMchOrderNo = genOrderNo(1000, 9999);
			$('#payMchOrderNo').text(payMchOrderNo);
		}

		// 生成订单号
		function genOrderNo(min, max) {
			return "PO" + new Date().getTime() + Math.floor(Math.random()*(max-min) + min);
		}

		form.render();
	})
</script>
</body>
</html>
