function showSearchComment() {
	document.getElementById('query').value = 'e.g. Silicone Valley, Palo Alto';
}

function hideSearchComment() {
	document.getElementById('query').value = '';
}

function activateTour1() {
	document.getElementById('tour1').style.zIndex = 3;
	document.getElementById('tour2').style.zIndex = 2;
	document.getElementById('tour3').style.zIndex = 1;
}

function activateTour2() {
	document.getElementById('tour1').style.zIndex = 2;
	document.getElementById('tour2').style.zIndex = 3;
	document.getElementById('tour3').style.zIndex = 1;
}

function activateTour3() {
	document.getElementById('tour1').style.zIndex = 1;
	document.getElementById('tour2').style.zIndex = 2;
	document.getElementById('tour3').style.zIndex = 3;
}