[Nexus]

<div>
	<img src="" id="image"/>
	<div><input type="button" value="Show random image" id="button"/></div>
</div>
<script>
	var imgs=[
			'http://www.icenews.is/wp-content/uploads/2015/02/animals-1-700x700.jpg',
			'https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcShZghyt2L03zlqdj_6F7EPbCCsWWnAcVsvJ3_xv7cc-IraZc-o',
			'https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTdPEJ0n_tXI0No_5AgkeVpzomxp4mI8jlQv3rsKQQHNh671QU_'
		],
		image=document.getElementById('image'),
		button=document.getElementById('button');
		
	button.onclick=function(){
		image.src=imgs[Math.floor(Math.random()*imgs.length)];
	}
</script>