$('#cc').combobox({

                url:'combobox_data1.json',

                method:'get',

                valueField:'id',

                textField:'text',

                panelHeight:'auto',

                multiple:true,

                formatter: function (row) {

                    var opts = $(this).combobox('options');

                    return '<input type="checkbox" class="combobox-checkbox">' + row[opts.textField]

                },

                onShowPanel: function () {

                    var opts = $(this).combobox('options');

                    var target = this;

                    var values = $(target).combobox('getValues');

                    $.map(values, function (value) {

                        var el = opts.finder.getEl(target, value);

                        el.find('input.combobox-checkbox')._propAttr('checked', true);

                    })

                },

                onLoadSuccess: function () {

                    var opts = $(this).combobox('options');

                    var target = this;

                    var values = $(target).combobox('getValues');

                    $.map(values, function (value) {

                        var el = opts.finder.getEl(target, value);

                        el.find('input.combobox-checkbox')._propAttr('checked', true);

                    })

                },

                onSelect: function (row) {

                    //console.log(row);

                    var opts = $(this).combobox('options');

                    var el = opts.finder.getEl(this, row[opts.valueField]);

                    el.find('input.combobox-checkbox')._propAttr('checked', true);

                },

                onUnselect: function (row) {

                    var opts = $(this).combobox('options');

                    var el = opts.finder.getEl(this, row[opts.valueField]);

                    el.find('input.combobox-checkbox')._propAttr('checked', false);

                }

            });