function SignInCheck() {
	var $username = $('#login-username').val();
	if ($username == '') {
		$('#login-error').text('请输入正确的通行证账号');
		return false;
	}

	var $password = $('#login-password').val();
	if ($password == '') {
		$('#login-error').text('请输入通行证密码');
		return false;
	}

	if ($('#login-captchaid').val()) {
		var $captcha = $('#login-captcha').val();
		if ($captcha.length != 6) {
			$('#login-error').text('请输入正确的验证码');
			return false;
		}
	}
	return true;
}