File 从外部文件调用jquery函数

我有一个Jquery文件（“Maestro.js”）和一个函数：

    function SetDDLNumbers () {
        for (var i = 0; i < 51; i++) {
            $('#ContentPlaceHolder3_ShuttersCount').append(new Option(i, i));
            $('#ContentPlaceHolder3_CollectedCount').append(new Option(i, i));
            $('#ContentPlaceHolder3_ValimCount').append(new Option(i, i));
            $('#ContentPlaceHolder3_UCount').append(new Option(i, i));
            $('#ContentPlaceHolder3_ShoeingCount').append(new Option(i, i));
            $('#ContentPlaceHolder3_EnginCount').append(new Option(i, i));
            $('#ContentPlaceHolder3_ProtectedSpaceCount').append(new Option(i, i));
            $('#ContentPlaceHolder3_GlassCount').append(new Option(i, i));
            $('#ContentPlaceHolder3_BoxesCount').append(new Option(i, i));
        }
    });

My asp file and the PageLoad function is : 

  protected void Page_Load(object sender, EventArgs e)
    {
        GridViewRow row = (GridViewRow)Session["selectedrow"];
        int ProjectID = Convert.ToInt32(row.Cells[1].Text);

        DBservices db = new DBservices();
        DataTable dt = db.GetCustomerInformation(ProjectID);

        if (!Page.IsPostBack)
        {
            SetPageDetails(dt);
            SetProjCurrentStatus();
            LoadSuppliers();
        }

        GetOrderStatus();
    }

当我试图编写：SetDDLNumbers（）时，它告诉我该函数无法识别。 如何调用此函数

<script src="javascript/maestro.js" type="text/javascript"></script>

 if (!Page.IsPostBack)
            {
                SetPageDetails(dt);
                SetProjCurrentStatus();
                LoadSuppliers();
            }