function showOnsite() {
	
	document.getElementById('onsite').style.display = 'block';
	document.getElementById('walking').style.display = 'none';
	document.getElementById('surrounding').style.display = 'none';
	
}

function showWalking() {
	
	document.getElementById('onsite').style.display = 'none';
	document.getElementById('walking').style.display = 'block';
	document.getElementById('surrounding').style.display = 'none';
	
}

function showSurrounding() {
	
	document.getElementById('onsite').style.display = 'none';
	document.getElementById('walking').style.display = 'none';
	document.getElementById('surrounding').style.display = 'block';
	
}