I want to create an effect where I have two images, with the first one hidden initially. When we hover over the second image, the first image should become visible. Here are the codes and class names related to the images:
<div class="entrycontent">
<p>
<a>
<img class="alignnone size-full wp-image-48" src="path" />
</a>
<a>
<img class="alignnone size-full wp-image-42" src="path" />
</a>
</p>
</div>