Untitled

Update script var's with value from drop down?
<script>
var languageFrom = " from ";
var languageTo = " to ";
</script>

<select>
<option value="en">En</option>
<option value="fr">Fr</option>
</select>

document.getElementById("yourSelect").onchange = function() {
    languageFrom = this.value;
}

selectNode.addEventListener("change", function(evt) {
        languageFrom=languageTo;
        languageTo = evt.target.value;
    },false);