替换 a 链接 confirm 询问框 [ 2.0 版本 ]

yii.confirm =  function (message, ok, cancel) {
    //$(this) a 节点
    layer.confirm(message, {
        icon: 3,
        title:'提示',
        resize :false,
        btn: ['确定','取消'],
    }, function(){
        !ok || ok();
    }, function(){
        !cancel || cancel();
    });
}