How expression is evaluated to determine type of browser?

Asked by: friending
Published on: 11:42/17.12.2007
Status: OPEN

I have this the expression which gives similarity of browser to Internet Explorer.

var IEmatch = document.all ? window.opera ? 0 : window.detachEvent ? window.createPopup ? 5.5 : 5 : 4 : 0;

Can somebody explain how this expression is evaluated in different browsers?
I know it is a bit confusing without brackets.
Any other ideas about recognizing type of browser are welcome.
Thanks a lot

Answer by: alexander
Posted on: 11:42/17.12.2007
Rating: 2 from possible 5 with 7 votes

var browser=navigator.appName;
if (browser="Opera"){}