JQuery :: Change IMG SRC On Hover Parent DIV

I'm working on a carousel with slides containing text and an image. On slide: hover, the text changes color, but I also need to change the picture. Normally I could use:
onmouseover="document.getElementById('niceImg').src='.....'"
To achieve this goal, but since the slides are dynamically rendered through wordpress, I can only use classes and no ID's. My main question is, how do I change a div's child img src (actually it's parent div > div > img) without assigning an ID to the particular image?

Code:
<div class="spotlightslidecontainer">
<a href="#">
<div class="spotlighticon">
<img src="img/spotlight/thumbactive.png"/>
</div>
<div class="spotlighttext">
<p>text</p>
</div>
</a>
</div>

So here the src of thumbactive.png needs to change to something else on spotlightslidecontainer:hover