如何包含 jquery.validate.js 文件(在本地目录中）并在表单验证中使用它

我知道包括<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.js"></script>就可以了，但我无法在任何地方找到下载文件并将其粘贴到本地目录后如何完成jquery.validate.js。

我通过将jquery.validate.js文件粘贴到与验证文件相同的目录中并使用 ： <script src="jquery.validate.js"></script> 来尝试，但它不起作用。

验证代码位于 register.phtml 文件中，其脚本部分为：

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.js"></script>
<script>
    $(document).ready(function () {
        // validate signup form on keyup and submit
        $("#registerForm").validate({
            rules: {
                first_name: "required",
                last_name: "required",
                contact_no: {
                    required: true,
                    digits: true,
                    minlength: 10,
                    maxlength: 13,
                },
                email: {
                    required: true,
                    email: true,
                },
                invitation_code: {
                    required: true,
                },
            },
            messages: {
                first_name: "Please enter your First Name",
                last_name: "Please enter your Last Name",
                contact_no: {
                    required: "Please enter your Contact Number",
                    digits: "Please enter only digits(0-9)",
                    minlength: "Minimum 10 digits are required",
                    maxlength: "Maximum 13 digits are allowed",
                },
                email: {
                    required: "Please enter a valid Email address",
                    email: "Your email address must be in the format of name@domain",
                },
                invitation_code: {
                    required: "Please check your email for Invitation Code",
                },
               
            }
        });
        $("#email").keypress(function () {
            $('.error_msg1').hide();
        });
        $('#invitationCode').click(function () {
            document.getElementById('invitation').innerHTML = "";
        });
        $("#first_name").on('keyup', function(e) {
                var val = $(this).val();
                if (val.match(/[^a-zA-Z]/g)) {
                  $(this).val(val.replace(/[^a-zA-Z]/g, ''));
                }
        });
        $("#last_name").on('keyup', function(e) {
                var val = $(this).val();
                if (val.match(/[^a-zA-Z]/g)) {
                  $(this).val(val.replace(/[^a-zA-Z]/g, ''));
                }
        });
        
        $('#submitform').click(function () {
        if (!$('#Check_TermsAndCondidation').prop('checked'))
            {
                $('#Check_TermsAndCondidation_msg').html('Please check Terms and Conditions');
                return false;
            }
        });
        
        $('#Check_TermsAndCondidation').change( function(){
            $('#Check_TermsAndCondidation_msg').html('');
        });
    });
</script>

上面的代码片段正在正确验证，但在将上述代码的第一行编辑为： <script src="jquery.validate.js"></script>，它不起作用。