/***************************************************************
 The script returns a set of browser variables:
	Variable			Description
	====================
	ie						Internet Explorer 4+ and IE-based third-party browsers. You can also be more specific:
	ie4					Internet Explorer 4 only.
	ie5					Internet Explorer 5 or 6.
	ie6					Internet Explorer 6 only.
	ns4					Netscape 4.
	ns6					Gecko and KDE-based browsers - which includes Nestcape 6 and 7, Mozilla, Konqueror and Safari. You can also identify smaller groups within this:
	ns7					Netscape 7.
	mz7					any gecko browser except Netscape. This is principally designed to identify Mozilla's own builds from Version 0.6 onwards, but it also returns true for any other non-netscape gecko browser.
	ffx					Firefox 1.0
	kde					Konqueror, from KDE 2.2 onwards.
	saf					Safari. This variable will identify Safari irrespective of which browser it's set to identify as.
	op5					Opera 5.
	op6					Opera 6.
	op7					Opera 7. This, and the previous two variables, will identify Opera irrespective of which browser it's set to identify as.

Underpinning these is a safety variable, for protecting legacy browsers:
	Variable			Description
	====================
	exclude			Primitive javascript browsers such as Netscape 3.

There are also three OS (Operating System) variables:
	Variable			Description
	====================
	win					Windows.
	mac					Macintosh.
	lnx					Linux, or anything else.

and you can query a lower-case version of the user-agent string:
	Variable			Description
	====================
	agt					User-agent string.

The sniffer variables are global, and therefore available to any other scripts on the same page. They allow you to code for or exclude specific browers, eg: 

	if (mac && ie5) { ... internet explorer 5 on a mac ... }
	if (!ns4) { ... not netscape 4 ... }
	if (win && (op5 || op6)) { ... a windows version of opera 5 or 6 ... }
	if (ie5 || ns6 || op7) { ... ie5+, gecko, kde or opera 7 ... }


 Remember that some browsers return true for more than one variable:

    * Internet Explorer 6 returns true for (ie6) and also for (ie)
    * Internet Explorer 5 or 6 return true for (ie5) and also for (ie)
    * Internet Explorer 4 returns true for (ie4) and also for (ie)
    * Konqueror returns true for (kde) and also for (ns6)
    * Safari returns true for (saf) and also for (ns6)
    * All Gecko-based browsers which aren't Netscape return true for (mz7) and also for (ns6)

The exclude variable returns true for all unspecified browsers. This is very useful for protecting them from scary code, eg: 

	if (!exclude) { ... 4+ browsers only ... }

You may find it necessary to use a combination of expressions to get to the browser you need, eg:

	if (!exclude) 
	{
		if (ns6 || op7) { ... gecko, KTHML or Opera 7 ... }
		else if (ie5) { ... internet explorer 5+ ... }
		else { ... any other 4+ browser ... }
	}

 There are several minor browsers which have enough DHTML support to pass one of the object tests, but not enough to be useful. The script specifically filters out (adds to the exclude group) - Espial Escape, ICEBrowser and OmniWeb.
***************************************************************/

var exclude=1;
var com=0;
var dcm="";

var agt=navigator.userAgent.toLowerCase();

// windows, mac or linux platform
var win=0;
var mac=0;
var lnx=1; 

if(agt.indexOf('win')!=-1){
	win=1;
	lnx=0;
}
if(agt.indexOf('mac')!=-1){
	mac=1;
	lnx=0;
}

//Browsers
var ie=0;
var ie4=0;
var ie5=0;
var ie6=0;
var ie7=0;

var op5=0;
var op6=0;
var op7=0;

var ns4=0;
var ns6=0;
var ns7=0;

var mz7=0;

var ffx=0;

var kde=0;

var saf=0;



// check for konqueror browser
if(typeof navigator.vendor!="undefined" && navigator.vendor=="KDE"){
	var thisKDE=agt;
	var splitKDE=thisKDE.split("konqueror/");
	var aKDE=splitKDE[1].split("; ");
	var KDEn=parseFloat(aKDE[0]);
	if(KDEn>=2.2){
		kde=1;
		ns6=1;
		exclude=0;
	}
}
	//webtv browser
else if(agt.indexOf('webtv')!=-1){
	exclude=1;
}
else if(typeof window.opera!="undefined"){
	exclude=0;
	if(agt.indexOf("opera/5")!=-1||agt.indexOf("opera 5")!=-1){op5=1;}
	if(agt.indexOf("opera/6")!=-1||agt.indexOf("opera 6")!=-1){op6=1;}
	if(agt.indexOf("opera/7")!=-1||agt.indexOf("opera 7")!=-1){op7=1;}
}
	// Internet Explorer browser
else if(typeof document.all!="undefined"&&!kde){
	exclude=0;
	ie=1;
	if(typeof document.getElementById!="undefined"){
		ie5=1;
		if(agt.indexOf("msie 6")!=-1){
			ie6=1;
			dcm=document.compatMode;
			if(dcm!="BackCompat"){
				com=1;
			}
		}
		
		if (agt.indexOf("msie 7") != -1 || agt.indexOf("msie 8") != -1) {
		    ie7 = 1;
		    dcm = document.compatMode;
		    if (dcm != "BackCompat") {
		        com = 1;
		    }
		}
		
	}
	else{
		ie4=1;
	}
}
	//Netscape Mozilla Safari browser
else if(typeof document.getElementById!="undefined"){
	exclude=0;
	if(agt.indexOf("netscape/6")!=-1||agt.indexOf("netscape6")!=-1){
		ns6=1;
	}
	else if(agt.indexOf("netscape/7")!=-1||agt.indexOf("netscape7")!=-1){
		ns6=1;
		ns7=1;
	}
	else if((agt.indexOf("gecko")!=-1) && (agt.indexOf("Firefox")!=-1)){
		ns6=1;
		mz7=1;
		ffx=1;
	}
	else if(agt.indexOf("gecko")!=-1){
		ns6=1;
		mz7=1;
	}
	if(agt.indexOf("safari")!=-1 || (typeof document.childNodes!="undefined" && typeof document.all=="undefined" && typeof navigator.taintEnabled=="undefined")){
		mz7=0
		ns6=1;
		saf=1;
	}
	
}
else if((agt.indexOf('mozilla')!=-1)&&(parseInt(navigator.appVersion)>=4)){
	exclude=0;
	ns4=1;
	if(typeof navigator.mimeTypes['*']=="undefined"){
		exclude=1;
		ns4=0;
	}
}
	//Excluded types
if(agt.indexOf('escape')!=-1){
	exclude=1;
	ns4=0;
}

if(typeof navigator.__ice_version!="undefined"){
	exclude=1;
	ie4=0;
}