function toggleNav(navNum) {
	
	if(navNum == "3") {
		document.getElementById("subnav1").style.display = "none";
		document.getElementById("subnav2").style.display = "none";
		document.getElementById("subnav3").style.display = "block";
	}
	else if(navNum == "2") {
		document.getElementById("subnav1").style.display = "none";
		document.getElementById("subnav2").style.display = "block";
		document.getElementById("subnav3").style.display = "none";
	}
	else {
		document.getElementById("subnav1").style.display = "block";
		document.getElementById("subnav2").style.display = "none";
		document.getElementById("subnav3").style.display = "none";
	}
}