function checkSignup()
{
	if($('#signup_username').val() == '')
	{
		alert('Please type in username');
		$('#signup_username').focus();
		return false;
	}
	if($('#signup_password').val() == '')
	{
		alert('Please type in password');
		$('#signup_password').focus();
		return false;
	}
	if($('#signup_password2').val() == '')
	{
		alert('Please confirm password');
		$('#signup_password2').focus();
		return false;
	}
	if($('#signup_password2').val() != $('#signup_password').val())
	{
		alert('Password does not match');
		$('#signup_password2').focus();
		return false;
	}
	if($('#signup_email_address').val() == '')
	{
		alert('Please type in email address');
		$('#signup_email_address').focus();
		return false;
	}else{
		var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
		if(!filter.test($('#signup_email_address').val()))
		{
			alert('Please enter a valid email address');
			$('#signup_email_address').focus();
			return false;
		}
	}
	return true;
}


function checkLogin()
{
	if($('#login_username').val() == '')
	{
		alert('Please type in username');
		$('#login_username').focus();
		return false;
	}
	if($('#login_password').val() == '')
	{
		alert('Please type in password');
		$('#login_password').focus();
		return false;
	}
	return true;
}

function checkLostpw()
{
	if($('#email_address').val() == '')
	{
		alert('Please type in email address');
		$('#email_address').focus();
		return false;
	}else{
		var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
		if(!filter.test($('#email_address').val()))
		{
			alert('Please enter a valid email address');
			$('#email_address').focus();
			return false;
		}
	}
	return true;
}

function checkChangepw()
{
	if($('#cu_password').val() == '')
	{
		alert('Please type in current password');
		$('#cu_password').focus();
		return false;
	}
	if($('#new_password').val() == '')
	{
		alert('Please type in new password');
		$('#new_password').focus();
		return false;
	}

	if($('#confirm_password').val() == '')
	{
		alert('Please confirm new password');
		$('#confirm_password').focus();
		return false;
	}

	if($('#confirm_password').val() != $('#new_password').val())
	{
		alert('Password does not match');
		$('#confirm_password').focus();
		return false;
	}
	return true;
}