Div tag within img tag

I need to add a text on each of the image and I have the image gallery constructed using img tags. Can't I append div tags under img tags. Similar to the one shown here :

<img id="img1" class="img1_1" src="hello1_1">
  <div class="textDesc">HELLO1_1</div>
</img>

Though the div is appended to img tag , but I cant see the text "HELLO1_1" on the image.

Please can anyone help me? If you need the source code I can share it with you.

Here is the link to test the scenario : http://jsfiddle.net/XUR5K/9/