// Libdetect.js. This simple browser detect script also illustrates how to use DOM standards-based feature detection. 

// Script and variables to indicate the current browser
   
var nn4 = false;   // Netscape Navigator or Communicator
var ie4 = false;
var ie5 = false;
var ie6 = false;
var moz = false;   // Mozilla, NS 6+, Konqueror, etc
var dom1 = false;   // fully supports DOM1
var dom2 = false;   // fully supports (important bits of) DOM2
var old = false;   // very old browser

function browser_detect()
{
   // do it the official W3C way

   if ( window.document.implementation != null)
   {
		dom1 = window.document.implementation.hasFeature
		   ("HTML","1.0");
		dom2 = window.document.implementation.hasFeature
		  ("HTML","2.0") &&
		   window.document.implementation.hasFeature
		  ("Events","2.0") &&
		   window.document.implementation.hasFeature
		  ("Core","2.0") &&
		window.document.implementation.hasFeature
		  ("CSS2","2.0");
   }

   // Mozilla based browsers contain the Gecko rendering engine

   moz = (window.navigator != null )
	 ? ( window.navigator.userAgent.indexOf("ecko") != -1 )
	 : false;

   nn4 = (window.document.layers != null && !moz);

   // IE has incremental support for the Document Object Model

   ie6 = (window.document.all && dom1);
   ie5 = (window.document.all && 
	  window.document.getElementsByTagName && !ie6);
   ie4 = (window.document.all && !ie6 && !ie5);
  
   // something horrible and old - sorry Opera.

   old = (!ie4 && !ie5 && !ie6 && !dom1 && !nn4 && !moz);

}

browser_detect();