Mootools 1.3我如何在“I”中获得if语句；注入；功能？

我需要在采纳代码中使用下面的if语句，但如果它存在，则它是无效的。有没有其他方法可以让我做同样的事情

var ele = new Element('li').adopt(

    new Element('span.title', {text:row.title}),
    new Element('span.subtitle').adopt(
        // Need this to work, but its invalid where it is atm
        if(row.subtitle = 1)
        {
            new Element('img', {src:'images/subTitle.png'})
        }
    ),
    new Element('span.bold', {text:row.bold}),
);

ele.iject(...

---

我对MooTools不是很熟悉，但我不明白这为什么不起作用：

var subtitle = new Element('span.subtitle');
if (row.subtitle == 1) subtitle.adopt(new Element('img', {src:'images/subTitle.png'}));

var ele = new Element('li').adopt(
    new Element('span.title', {text:row.title}),
    subtitle,
    new Element('span.bold', {text:row.bold}),
);

如果FTW：

var ele = new Element('li').adopt(

    new Element('span.title', {text:row.title}),
    new Element('span.subtitle').adopt(
        (row.subtitle == 1) ? new Element('img', {src:'images/subTitle.png'}) : null
    ),
    new Element('span.bold', {text:row.bold}),
);

---

干杯：P应该这样想