HTML中的TF中的ajax？

How can I echo the 'res' values (returned by a php - mysql) in a text field named "CurrentVal" in HTML?

$.ajax({
    type:'GET',
    url:'php/myphp.php',
    dataType:'json',
    success: function(response){
    var res   =   response[0].result,
            stu   =   response[0].student;
            //console.log(response);
}
});

$.ajax({
    type:'GET',
    url:'php/myphp.php',
    dataType:'json',
    success: function(response){
    var res   =   response[0].result,
            stu   =   response[0].student;
$('#CurrentVal').val(res);
            //console.log(response);
}
});