Resolve Error - cannot Read Property '_notified' of Null

During testing what we found that our some pages throwing below mentioned error in Chrome browser.

 

Cannot read property '_notified' of null 

 

The problem is that the browser detection code in MicrosoftAjax.js does not detect WebKit (gasp!). Include this javascript code to your page in which you are getting error.

 

Sys.Browser.WebKit = {};

if (navigator.userAgent.indexOf('WebKit/') > -1) {

Sys.Browser.agent = Sys.Browser.WebKit;

Sys.Browser.version = parseFloat(navigator.userAgent.match(/WebKit\/(\d+(\.\d+)?)/)[1]);

Sys.Browser.name = 'WebKit';

}