A full list of browser functions and how you can use them:
In my opinion Browser Functions are the most important functions while writing Javascript!
This is because different browsers will interpret your script differently, an example of this is that IE actually reads
your javascript as Jscript (Microsoft's version of javascript). Using browser detection will enable cross-browser compatibility.
Two examples of how Browser detection Methods can help are:
1. Instead of including links to pages in alternate languages, why not use javascript to auto-detect the user language
and redirect them automatically.
2. You wish to create a new page element. It would be useful to know the users screen size prior to enable you to adjust the size suitably.