IE 10 Date Format

Hi,



I am using sencha touch 2.3.0.



Below is my code:



due = "01-FEB-12"; //This is coming from database

nextDue = Ext.DateExtras.format(new Date(due), "d M Y");



While I am running the above code in IE 10 (or IE 11) I am getting following exception "Unable to get property 'substring' of undefined or null reference".



any help.



Thanks,

Shiva.