如何返回值

See my code and please see what is my problem

$('#StartPiCam').click(function(){
            $.ajax({
                url: "StartPiCam",
                type: "GET",
                data: "value=1",
                //dataType: "json",
                //success: onDataReceived
            });
            $.ajax({
                url: "PiCam_Brightness",
                type: "GET",
                data: "Brightness={$('#Brightness').val()}",
                //dataType: "json",
                //success: onDataReceived
            });
        });

<INPUT ID="Brightness" TYPE=TEXT NAME="Brightness" VALUE="50" SIZE=12 MAXLENGTH=3 NOFINSIDE="~!   ~!" >

it returns 0 but I expect returning the value of the input "Brightness"

Changed the data format

This would work according to me.

$('#StartPiCam').click(function(){
            $.ajax({
                url: "StartPiCam",
                type: "GET",
                data: {value: '1'},
                //dataType: "json",
                //success: onDataReceived
            });
            $.ajax({
                url: "PiCam_Brightness",
                type: "GET",
                data: {Brightness: $('#Brightness').val()}",
                //dataType: "json",
                //success: onDataReceived
            });
        });