var clsRender = function(value){

    if (value == 'male') {

        return "<span style='color:red;font-weight:bold;'>红男</span>";

    } else {

        return "<span style='color:green;font-weight:bold;'>绿女</span>";

    }

}},  

    var cm = new Ext.grid.ColumnModel([

        {header:'编号',dataIndex:'id'},

        {header:'性别',dataIndex:'sex',renderer:clsRender},

        {header:'名称',dataIndex:'name'},

        {header:'描述',dataIndex:'descn',renderer:renderDescn}

    ]);