random class rotation

HTML

<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<div id="keyvisual">
	<div class="kvWrapper">
		first
	</div>
	<div class="kvWrapper">
		second
	</div>
	<div class="kvWrapper">
		third
	</div>
<!-- /#keyvisual --></div>

CSS

.kvWrapper {
  display: none;
}

.kvDisplay {
  display: block;
}

JavaScript

var classes = ["kvDisplay", " ", " "];
classes.sort(function(){ return Math.random() - .5 });

$("#keyvisual .kvWrapper").each(function(){
  $(this).addClass(classes.pop());
});