In some existing code there is a test to see if the user is running IE, by checking if the object Browser.Engine.trident is defined and returns true.
But how can I deter
The Navigator object contains all the information about the user's browser:
eg:
var browser=navigator.appName;
var b_version=navigator.appVersion;
var version=parseFloat(b_version);
See:
http://www.w3schools.com/js/js_browser.asp