var $buoop = {} 
$buoop.ol = window.onload; 
window.onload=function(){ 
	if ($buoop.ol) $buoop.ol(); 
	var e = document.createElement("script"); 
	e.setAttribute("type", "text/javascript"); 
	e.setAttribute("src", "http://browser-update.org/update.js"); 
	document.body.appendChild(e); 
} 


$(document).ready(function(){
	

	
	
	shuffle = function(v){
    	for(var j, x, i = v.length; i; j = parseInt(Math.random() * i), x = v[--i], v[i] = v[j], v[j] = x);
   		return v;
	};

	
	var indexes = [0, 1, 2, 3, 4, 5];
	indexes = shuffle(indexes).slice(0,2);

	$(".reference").each( function (index) {
		if (jQuery.inArray(index, indexes) >= 0) $(this).show();
	});
});