var myview = $.extend({}, $.fn.datagrid.defaults.view, {
    renderFooter: function(target, container, frozen){
        var opts = $.data(target, 'datagrid').options;
        var rows = $.data(target, 'datagrid').footer || [];
        var fields = $(target).datagrid('getColumnFields', frozen);
        var table = ['<table class="datagrid-ftable" cellspacing="0" cellpadding="0" border="0"><tbody>'];
         
        for(var i=0; i<rows.length; i++){
            var styleValue = opts.rowStyler ? opts.rowStyler.call(target, i, rows[i]) : '';
            var style = styleValue ? 'style="' + styleValue + '"' : '';
            table.push('<tr class="datagrid-row" datagrid-row-index="' + i + '"' + style + '>');
            table.push(this.renderRow.call(this, target, fields, frozen, i, rows[i]));
            table.push('</tr>');
        }
         
        table.push('</tbody></table>');
        $(container).html(table.join(''));
    }
});
$('#list').datagrid({
     view:myview
     });
  <table id = "list" class="easyui-datagrid" title="投资情况统计表" style="width:960;"fixRowHeight="true" 
                data-options="rownumbers:false,singleSelect:true,url:'<%=webRoot %>/hqswq/report/tzqkInfo.do?nf=<%=nf %>',method:'get',showFooter: true,rowStyler: function(index,row){
                    if (row.fg == '总计'){
                        return 'background-color:#6293BB;color:#fff;font-weight:bold;';
                    }
                }">