Sys.Browser.agent Field
Gets an object that represents the user agent of the browser.
var agent = Sys.Browser.agent;
Return Value
One of the following objects that represent the user agent of the current browser:
Sys.Browser.InternetExplorer
Sys.Browser.Firefox
Sys.Browser.Safari
Sys.Browser.Opera
If the user agent cannot be identified, null is returned.
Remarks
The object that is returned is based on the HTTP user-agent string that identifies the browser.