ASP.NET CheckBoxList check and uncheck with jQuery

//

function SetFishingDay() {

                var txtval = $("#<%= txt_setday.ClientID %>").val();

                var $ctrls = $('#<%= chkdayoffishing.ClientID %>');

                var mm = '';

                //Uncheck all

                var selValuefalse = [1,2,3,4,5,6,7];              

                for (var i = 0; i < selValuefalse.length; i++) {

                    $ctrls.find('input:checkbox[value=' + selValuefalse[i] + ']').prop('checked', false);

                }

                //check selected

                var selValuetrue = [];

                for (var i = 0; i < txtval.length; i++) {

                    selValuetrue.push(txtval[i]);

                }

                var $ctrls = $('#<%= chkdayoffishing.ClientID %>');

                for (var i = 0; i < selValuetrue.length; i++) {

                    $ctrls.find('input:checkbox[value=' + selValuetrue[i] + ']').prop('checked', true);

                }

                return false;

            }