在if-else语句中更改Jquery变量

--原始代码--

$(function () {

    var options = {
    xaxis: { mode: "time", tickLength: 5 },
    selection: { mode: "x" },
    crosshair: { mode: "x" }
    };

 });

我希望交叉线：{mode:“x”}在rlt=true时位于选项变量内部

下面是我的代码，但不正确。有人能指出错误吗

谢谢

$(function () {
    var rlt = true;
    var options;
    if(rlt){
        options = {
        xaxis: { mode: "time", tickLength: 5 },
        selection: { mode: "x" },
        crosshair: { mode: "x" }
        };
    }else{
        options = {
        xaxis: { mode: "time", tickLength: 5 },
        selection: { mode: "x" }
        };  

    }
 });

---

如果在

$（函数（）{}

---

变量的作用域。

适用于我，但您可以这样编写：

var rlt = true;
var options = {
    xaxis: { mode: "time", tickLength: 5 },
    selection: { mode: "x" }
    };  

if (rlt) options.crosshair = { mode: "x" }

---

在哪里检查选项变量中的值？适用于我：；