```
<div id="yui_3_16_0_1_1399697074576_1339" class="cbox " role="gridcell">
<input id="yui_3_16_0_1_1399697074576_1338" type="checkbox" tabindex="-1" 89513626107905="" aria-label="Message " title="Select this email">
<span id="yui_3_16_0_1_1399697074576_1340" class="icon"></span>
</div>`

```

The above HTML is from firebug.

I want to click the checkbox, its ID is `id="yui_3_16_0_1_1399697074576_1338"` from above. I tried using `by.id` and `by.path`, however neither of them work.
The following is what I tried:

```
By.id("yui_3_16_0_1_1399697074576_1338")
By.xpath("//input[@id='yui_3_16_0_1_1399697074576_1339'

```

Can someone help me on this?