Firebase set does not work

<script src="http://ift.tt/2a0fz98"></script>
<script src="http://ift.tt/2asGzfk"></script>
<script src="http://ift.tt/2ae0pOH"></script>
<script src="http://ift.tt/2asGEzH"></script>
<script src='http://ift.tt/185z2Pa'></script>
<script src='http://ift.tt/1qRgvOJ'></script>
<script>
    var config = {
        apiKey : "AIzaSyCnmZWNwp3CfjXDcDL5MADIej6GwvxWEtQ",
        authDomain : "dsmweb-ba185.firebaseapp.com",
        databaseURL : "http://ift.tt/2ae0bXV",
        storageBucket : "dsmweb-ba185.appspot.com",
    };
    firebase.initializeApp(config);
    var usersRef = ref.child("assignment");
    userRef.set(<%=submit%>);
</script>

This is my code .. And That does not work. submit variable is mean

{Testuser={date=8/8, teachername=Testuser, title=Let's do homework}}