CheckBox in Grid View inside a modal popup

CheckBox in Grid View inside a modal popup

I have a CheckBox field in a GridView in an aspnet webform, which I want to show in a modal popup window when user clicks a button. When user select each checkbox, I want to run server side code for OnCheckedChanged event for that checkbox using jQuery.

I am using the following to achieve my requirement

        $(function () {
            $("[id*=btnShowPopup]").click(function () {
                ShowPopup();
                return false;
            });
        });
        function ShowPopup() {
            $("#dialog").dialog({
                title: "GridView",
                width: 1100,
                buttons: {
                    Ok: function () {
                        $(this).dialog('close');
                    },

                },
                open: function (type, data) {
                    $(this).parent().appendTo("form1");
                    $("input[type=checkbox]").click(function () {
                        $("input[type=checkbox]").trigger("change");
                        } else {

                            alert("false");
                        }
                    });

                },
                modal: true
            });
        }
When the checkbox is checked I get no response, but when it is unchecked, alert is shown.

Can anyone please through some light?