function showhidebox(obj) { //function shows & hides element
	var element = document.getElementById(obj);
	if ( element.style.display != "block" ) {
		element.style.display = 'block';
	}
	else { element.style.display = 'none';}
}

function pageload() { //function hides mission and explore on page load
	var explore = document.getElementById('explore');
	explore.style.display = 'none';
	init();
}

window.onload = pageload;