AtAuction.com Landing Page JS/JQuery Condensed Registration

<script type="text/javascript">
    function grabUser() {
        var number = Math.floor((Math.random()*9)+1);
        var email = document.getElementById("myEmailField").value
        var user = document.getElementById("myEmailField").value
        if (user!=null || user!="") {
            $("input[name=emailConfirm]").val(email)

            user = user.split("@")[0];
            user = user + "12" + number;
            $("input[name=name]").val(user)
        }
    }
    function grabPass() {
        var pass = document.getElementById("myPasswordField").value
        $("input[name=pwdConfirm]").val(pass)
    }
</script>