CODE EXAMPLE FOR JAVASCRIPT

password regex javascript long way

function validatePassword() {
    var p = document.getElementById('newPassword').value,
        errors = [];
    if (p.length < 8) {
        errors.push("Your password must be at least 8 characters"); 
    }
    if (p.search(/[a-z]/i) < 0) {
        errors.push("Your password must contain at least one letter.");
    }
    if (p.search(/[0-9]/) < 0) {
        errors.push("Your password must contain at least one digit."); 
    }
    if (errors.length > 0) {
        alert(errors.join("
"));
        return false;
    }
    return true;
}