function validateForm(){
    var username = document.getElementById('newusername').value;
    var password = document.getElementById('newpassword').value;
    var email = document.getElementById('email');

    if(validateUsername(username) && validatePassword(password) && validateEmail(email)){
        return true;
    }
    else {
        return false;
    }
}

function validatePassword(pswd){
    var pswdReg = new RegExp(/^[A-Za-z0-9 _-]+$/);
    var pswdtmp = pswd.match(pswdReg);
    if(pswdtmp!=null){
        document.getElementById('passwordPic').src = "lol.png";
        return true;
    }
    else {
        document.getElementById('passwordPic').src = "trolo.jpg";
        return false;
    }
}
function validateUsername(username){
    var userReg = new RegExp(/^[a-zA-Z]+$/);
    var usertmp = username.match(userReg);
    if(usertmp!=null){
        document.getElementById('userPic').src = "lol.png";
        return true;
    }
    else {
        document.getElementById('userPic').src = "trolo.jpg";
        return false;
    }
}
function validateEmail(email){
    var emailReg = new RegExp(/^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/);
    var mailtmp = email.match(emailReg);

    if(mailtmp!=null){
        document.getElementById('mailPic').src = "lol.png";
        return true;
    }
    else {
        document.getElementById('mailPic').src = "trolo.jpg";
        return false;
    }

}