jqgrid更改列标题属性

var myGrid = $('#myGrid').jqGrid({
    colNames: ['Name', 'Age', 'Address'],
    colModel: [
        { name: 'name', index: 'name', width: 150 },
        { name: 'age', index: 'age', width: 80, align: 'right' },
        { name: 'address', index: 'address', width: 200, sortable: false }
    ],
    width: 500,
    height: 300
});

myGrid.jqGrid('navGrid', '#pager', {
    view: true,
    edit: true,
    add: true,
    del: true,
    search: true,
    refresh: true,
    beforeRefresh: function () {
        myGrid.jqGrid('setGridParam', {
            url: '/api/data?id=' + myGrid.jqGrid('getGridParam', 'id')
        }).trigger('reloadGrid');
    }
});