function emailCheck(email) {
	if (email.indexOf('@', 0) == -1) {
		alert("Please enter a valid email address.");
		return false;
	}
	
	if (email.indexOf('.', 0) == -1) {
		alert("Please enter a valid email address.");
		return false;
	}
	
	if (email.indexOf(' ', 0) != -1) {
		alert("Please enter a valid email address.");
		return false;
	}
	
	if (email.length<7) {
		alert("Email address too short.");
		return false;
	}
	
	return true;
}
//---------------------------------------------------------------