function sendContactForm(){
	var firstname = $("#firstname").val();
	var lastname = $("#lastname").val();
	var email= $("#email").val();
	var message = $("#message").val();
	
	if( email == "" ){
		$.post("ajax/translate.php", {id: "no_email"}, setAlert);
		
		return;
	}
	
	if( !isValidEmail(email) ){
		$.post("ajax/translate.php", {id: "invalid_email"}, setAlert);
		
		return;
	}
	
	if( message == "" ){
		$.post("ajax/translate.php", {id: "no_message"}, setAlert);
		
		return;
	}
	
	$.post("ajax/contact.php", {firstname: firstname, lastname: lastname, email: email, message: message}, setAlert);
}


function setAlert(data){
	$("#alert").html(data);
	
	$("#alert").css({display: "block"});
}


function isValidEmail(email){
	var mail_filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	
	return mail_filter.test(email);
}