这个文档怎么理解，新手求助

<script>
        $(function(){
            $('#cc').combogrid({
                panelWidth:450,
                value:'006',

                idField:'code',
                textField:'name',
                url:'datagrid_data.json',
                columns:[[
                    {field:'code',title:'Code',width:60},
                    {field:'name',title:'Name',width:100},
                    {field:'addr',title:'Address',width:120},
                    {field:'col4',title:'Col41',width:100}
                ]]
            });
        });
        function reload(){
            $('#cc').combogrid('grid').datagrid('reload');
        }
        function setValue(){
            $('#cc').combogrid('setValue', '002');
        }
        function getValue(){
            var val = $('#cc').combogrid('getValue');
            alert(val);
        }
        function disable(){
            $('#cc').combogrid('disable');
        }
        function enable(){
            $('#cc').combogrid('enable');
        }
    </script>