解析json数据
{"Orders":[{"pos":"1","OrderID":"199","CustomerID":"TOMSP","EmployeeID":"6","ShipVia":"1","Freight":"14.6800","ShipName":"Toms}]}

如题。小弟不才，刚接触json,请大侠指点，帮忙使用ajax  解析以上数据。
------解决方案--------------------

				$.ajax({

				type: "POST",

				url: "667.php",

				dataType:"json",

				success: function(json) {

					alert(json['Orders']['pos']);



				}

				});