dunakov,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.wrapper .hide, .wrapper :checked + label img, .wrapper input{
display: none;
}
.wrapper :checked ~ .hide {
display: block;
}
</style>
</head>
<body>
<div class="wrapper">
<input id="mic" name="" type="checkbox">
<label for="mic"><img src="http://im.haberturk.com/2013/02/06/ver1360145679/817721_detay.jpg" alt="Image" /></label>
<div class="hide">
<label for="mic"><img src="http://blagoveshensk.bezformata.ru/content/image62720071.jpg" alt="Image" /></label>
Hidden content</div>
</div>
</body>
</html>