function show_alert(alert_type) {
	if (alert_type == 1) { //hearts
		document.getElementById("feedback").innerHTML = "Thanks for the feedback!";	
	} else if (alert_type == 2) { //suggestion
		document.getElementById("feedback").innerHTML = "Thanks for the suggestion!";	
	}

	document.getElementById("feedback").innerHTML += "<br><br>This will disappear in 5 seconds";

	document.getElementById("alerts").style.display = "block";
	document.getElementById("alerts").style.opacity = 1;
	
	setTimeout("hide_alert()",5000);
}

function hide_alert() {
	setInterval("fade_alert()",100);
}

function fade_alert() {
	var cur_opacity = document.getElementById("alerts").style.opacity;
	if (cur_opacity == 0)
		clearInterval();
	else
		document.getElementById("alerts").style.opacity = cur_opacity - 0.1;
}