Javascript innerHTML无法用于图像，但可以用于文本吗?

好吧，我有一个javascript函数，当用户更改选择下拉框的选项时，该函数会切换div标签的innerhtml.

Ok, i have a javascript function which toggles the innerhtml of a div tag when a user changes the option of a select dropdown box..

这一切都可以在文本上正常运行，但是使用图片标签会停止工作吗?

It all works fine with text, but with an image tag it stops working?

工作示例...

function toggle(opt) {
        var d = document.getElementById('div_tag');
        if (opt == '5') {
                d.innerHTML = 'FIVE';
        }
        else if (opt == '4') {
                d.innerHTML = 'FOUR';
        }
        etc...
}

不起作用的示例...

Not Working Example...

function toggle(opt) {
        var d = document.getElementById('div_tag');
        if (opt == '5') {
                d.innerHTML = '<img src='path/img1.jpg'><img src='path/img2.jpg'>';
        }
        else if (opt == '4') {
                d.innerHTML = '<img src='path/img2.jpg'><img src='path/img1.jpg'>';
        }
        etc...
}

这就是我的select和div标签上的内容.

This is what i have on my select and div tags.

<select onchange='toggle(this.value);'>
<div id='div_tag'></div>

有人告诉我我在这里错了吗，因为我很困惑.为什么当一个不同的东西是另一个是文本时，为什么一个工作而不是另一个工作呢?

Anyone tell me what i'm doing wrong here cos i am stumped.. why would one work and not the other when all that is different is one been the other being text??

谢谢.