window.onload = rDivs;

function rDivs() {
	var mix = Math.floor(Math.random()*9);
	                       	
	if (mix == 0) {
		document.getElementById("contentBox3").style.display = "block";
		document.getElementById("contentBox5").style.display = "none";
		document.getElementById("contentBox7").style.display = "none";
		document.getElementById("contentBox4").style.display = "block";
		document.getElementById("contentBox6").style.display = "none";
		document.getElementById("contentBox8").style.display = "none";		
	}
	else if (mix == 1) {
		document.getElementById("contentBox3").style.display = "block";
		document.getElementById("contentBox5").style.display = "none";
		document.getElementById("contentBox7").style.display = "none";
		document.getElementById("contentBox4").style.display = "none";
		document.getElementById("contentBox6").style.display = "block";
		document.getElementById("contentBox8").style.display = "none";
	}
	else if (mix == 2) {
		document.getElementById("contentBox3").style.display = "block";
		document.getElementById("contentBox5").style.display = "none";
		document.getElementById("contentBox7").style.display = "none";
		document.getElementById("contentBox4").style.display = "none";
		document.getElementById("contentBox6").style.display = "none";
		document.getElementById("contentBox8").style.display = "block";
	}
	else if (mix == 3) {
		document.getElementById("contentBox3").style.display = "none";
		document.getElementById("contentBox5").style.display = "block";
		document.getElementById("contentBox7").style.display = "none";
		document.getElementById("contentBox4").style.display = "block";
		document.getElementById("contentBox6").style.display = "none";
		document.getElementById("contentBox8").style.display = "none";
	}
	else if (mix == 4) {
		document.getElementById("contentBox3").style.display = "none";
		document.getElementById("contentBox5").style.display = "block";
		document.getElementById("contentBox7").style.display = "none";
		document.getElementById("contentBox4").style.display = "none";
		document.getElementById("contentBox6").style.display = "block";
		document.getElementById("contentBox8").style.display = "none";
	}
	else if (mix == 5) {
		document.getElementById("contentBox3").style.display = "none";
		document.getElementById("contentBox5").style.display = "block";
		document.getElementById("contentBox7").style.display = "none";
		document.getElementById("contentBox4").style.display = "none";
		document.getElementById("contentBox6").style.display = "none";
		document.getElementById("contentBox8").style.display = "block";
	}
	else if (mix == 6) {
		document.getElementById("contentBox3").style.display = "none";
		document.getElementById("contentBox5").style.display = "none";
		document.getElementById("contentBox7").style.display = "block";
		document.getElementById("contentBox4").style.display = "block";
		document.getElementById("contentBox6").style.display = "none";
		document.getElementById("contentBox8").style.display = "none";
	}
	else if (mix == 7) {
		document.getElementById("contentBox3").style.display = "none";
		document.getElementById("contentBox5").style.display = "none";
		document.getElementById("contentBox7").style.display = "block";
		document.getElementById("contentBox4").style.display = "none";
		document.getElementById("contentBox6").style.display = "block";
		document.getElementById("contentBox8").style.display = "none";
	}
	else {
		document.getElementById("contentBox3").style.display = "none";
		document.getElementById("contentBox5").style.display = "none";
		document.getElementById("contentBox7").style.display = "block";
		document.getElementById("contentBox4").style.display = "none";
		document.getElementById("contentBox6").style.display = "none";
		document.getElementById("contentBox8").style.display = "block";
	}
}