function init_keys() {
	document.onkeyup = function (e) {
		if (e) {
			key = e.keyCode;
		}
		else if (window.event) {
			key = window.event.keyCode;
		}
		
		if (key==37) {
			trigger = document.getElementById('navigation_prev');
			if (trigger) {
				document.location.href=trigger.href;
			}
		}
		else if (key==39) {
			trigger = document.getElementById('navigation_next');
			if (trigger) {
				document.location.href=trigger.href;
			}
		}
	}
}

function showEmail (prefix) {
	document.write(prefix+'@johnwillsund.se');
}

function toggle_map(sender) {
	obj = document.getElementById('map');
	link = document.getElementById('toggle_map_link');
	if (obj.style.visibility == "hidden") {
		obj.style.visibility = "visible";
		link.innerHTML = "Dölj karta";
	}
	else {
		obj.style.visibility = "hidden";
		link.innerHTML = "Visa på karta";
	}
}

function toggle_overview_map() {
	obj = document.getElementById('map');
	link = document.getElementById('toggle_overview_map_link');
	if (obj.style.display == "none") {
		obj.style.display = "block";
		link.innerHTML = "Dölj geotaggade platser och foton";
	}
	else {
		obj.style.display = "none";
		link.innerHTML = "Visa geotaggade platser och foton";
	}
}