input-validation.js

    function isNumeric(val) {
        return parseFloat(val)==val;
    }
    function isAlpha(str) {
        return str.match("^[A-Za-z]+$");
    }

    function isUpperCase(str) {
        var regex = /^(?=.*[A-Z]).+$/;
        return regex.test(str);
    }

    function isLowerCase(str) {
        var regex = /^(?=.*[a-z]).+$/;
        return regex.test(str);
    }

    function isAlphaNumeric(str) {
        return str.match("^[0-9A-Za-z]+$");
    }

    function isSpaceExist(str) {
        var regex = /^\S*$/;
        return regex.test(str);
    }

    function isNoSpecialChar(str){
        return str.match("^[-A-Za-z0-9.\/\'\g\w+, ]+$");
    }

    function isEmail(str) {
        var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
        return re.test(str);
    }

    function trim(str)
    {
       return str.replace(/^\s+|\s+$/g,"");
    }

    function checkday(year, month, day)
    {
        return  (month > 0 && month < 13) && (year > 0 && year < 32768) && (day > 0 && day <= (new Date(year, month, 0)).getDate());
    }

    function checkAccount(TxtNoRek)
    {
        return TxtNoRek.match("^[0-9]+$");
    }

    function checkBRIAccount(TxtNoRek)
    {
        var nSubTotal = 0;
        var nTotal = 0;
        var weight = "32765432765432";

        for(var b=0;b<14;b=b+1) {
            nSubTotal = parseInt(TxtNoRek.substring(b, b+1)) * parseInt(weight.substring(b, b+1));
            nTotal = nTotal + nSubTotal;
        }

        var nRem = nTotal % 10;
        var nRemMin = 10 - nRem;
        var cek = 0;

        if(nRemMin < 10) {
            cek = nRemMin;
        }

        if(cek != parseInt(TxtNoRek.substring(14))) {
            return false;
        }

        return true;
    }

    function checkCardNumber(card_no)
    {
        var isNumber = new Number(card_no);
        if (isNumber == 'NaN'){
            return false;
        }

        var digit = 0;
        var counter = 0;
        if(card_no.length % 2 === 0 )
        {
            var i = 0;
            for (i = 0; i < card_no.length;i++)
            {
                digit = new Number(card_no.charAt(i));
                if (((i + 1) % 2) === 0){
                    counter += digit;
                } else {
                    if ((digit * 2)  > 9){
                        counter += ((digit * 2) - 9);
                    } else {
                        counter += (digit * 2);
                    }
                }
            }
        }
        else
        {
            var i = 0;
            for(i = 0; i < card_no.length;i++)
            {
                digit = new Number(card_no.charAt(i));
                if (((i + 1) % 2) != 0){
                    counter += digit;
                } else {
                    if ((digit * 2)  > 9) {
                        counter += ((digit * 2) - 9);
                    } else {
                        counter += (digit * 2);
                    }
                }
            }
        }

    if (counter % 10 === 0) {
        return true;
    } else {
        return false;
    }
}