// password requirement
function checkPasswordReq(pwd) {
    if (pwd.length < 8) {
        isBest = false;
    } else {
        isBest = true;
    }
    return isBest
}

// to get the queries of the URL
function getQueryStringParams(params, url) {
    // first decode URL to get readable data
    var href = decodeURIComponent(url || window.location.href);
    // regular expression to get value
    var regEx = new RegExp('[?&]' + params + '=([^&#]*)', 'i');
    var value = regEx.exec(href);
    // return the value if exist
    return value ? value[1] : null;
}