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<script>
	$(document).ready(function() {
		// RANDOMIZE BACKGROUND
		var backgroundFiles = ['1.jpeg', '2.jpeg', '3.jpeg', '4.jpg'];
		var backgroundsRandom = backgroundFiles[Math.floor(Math.random() * 4)];
		$('body').css('background-image', 'url(img/' + backgroundsRandom + ')');
		
	});
</script>

<style type="text/css">
	body{
		background-size: cover;
		background-position: center; 
		background-repeat: no-repeat;
	}
</style>