$.ajax({        url: '/service/AirBtcService.asmx/AirBtc_AV',        type: 'POST',        data: { depcity: depcity, aircity: arrcity, flightdate: d1, airco: airco },        dataType: 'xml',        timeout: 30000,        error: function(o) {            if (o.readyState == 0)                alert("查詢超時");            else                alert(o.responseText);        },        success: showFlight    });});function showFlight(flight) {//......}例如上面的 代碼： function showFlight(flight)(){}中的 參數flight 是怎樣來的。請各位大蝦指點指點。