rnd.today=new Date();
rnd.seed=rnd.today.getTime();
function rnd() {
	rnd.seed = (rnd.seed*9301+49297) % 233280;
	return rnd.seed/(233280.0);
}

function rand(number) {
	return Math.ceil(rnd()*number);
}
var rndFeature = rand(4); //Put in the number of features
var featEle = "feature" + rndFeature;

if (document.getElementById(featEle)) {
	document.getElementById(featEle).style.display = "block";
}