evalJS not working with Android but is fine in iPhone

using Android version 4.4 with Titanium 3.2.0 GA.

This code returns null on Android but works fine in iPhone.

var currentResolution = webView.evalJS('$("#txtResolution").val();');

currentResolution is null under android but not iPhone.

So the expression doesn't return a value. If instead of assigning the value, I simply put it inside an alert within the jQuery script, the value gets displayed in an alert and is not null. as bellow:

webView.evalJS('alert($("#txtResolution").val())');

The alert value is correct. Any ideas how to get the value and assign it to a variable? The webpage is also external.