var checkRegisterForm = function() { var regname = /\w{3,10}/, regpass = /.{6,20}/, uname = document.getElementById('username'), upass = document.getElementById('password'), upass02 = document.getElementById('password-2'), error = document.getElementById('test-error');

            if (!regname.test(uname.value)) {
                    error.innerHTML = '用户名必须是3-10位英文字母或数字！';
                    return false;
                }
            else if (!regpass.test(upass.value)) {
                    error.innerHTML = '密码必须是6-20位字符！';
                    return false;
                }
            else if (upass02.value != upass.value) {
                    error.innerHTML = '重复密码不一致！';
                    return false;
                }
            else {
                    return true;
                }

}