How to write Function to validate input password pattern in mvc using Jquery

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 function validatepin(cpin) {

    //var paswd = /^(?=.*\d)(?=.*[^a-zA-Z0-9])(?!.*\s).{8,8}$/;

    if (containsCharacters(cpin) && containsNumber(cpin) && containsSpecialCharacters(cpin)) {                return true;

    } else {       

        return false;

    }

}


function containsCharacters(val) { var regex = /[A-z]/; var isValid = regex.test(val); return isValid; }


function containsNumber(val) { var regex = /[0-9]/; var isValid = regex.test(val); return isValid; }


function containsSpecialCharacters(val) { var regex = /[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]/; var isValid = regex.test(val); return isValid; }

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