Sharepoint 2013: Object doesn’t support property or method ‘startsWith'” in web part page

Server: Sharepoint 2013 On-premise

Client : Windows 7 Pro. + IE 11

Case: We have deployed a Visual Web Part on a ‘Web Part Page’ in Sharepoint 2013 Server. As soon as client load this page on IE 11 browser it gives “SCRIPT438: Object doesn’t support property or method ‘startsWith’” JS error in the File “MicrosoftAjaxWebForms.js“.

This Visual Web part is working fine on Sharepoint 2007. We are in the process of migration to Sharepoint 2013.

Any Hint to resolve this issue will be much appreciated.

Thanks

Hafeez