function checkFields() {
	if (document.getElementById('type').selectedIndex == 0 && document.getElementById('price').selectedIndex == 0 && document.getElementById('city').selectedIndex == 0) {
		alert("Please select at least one criteria before searching.");
		return false;
	}
	return true;
}

function verifyLogin() {
	if (document.getElementById('email').value == "" || document.getElementById('password').value == "") {
		alert("Please enter your e-mail and password.");
		return false;
	}
	return true;
}