// Browser detection system

function its() {

	var n = navigator;
	// string comparisons are much easier if we lowercase everything now.
	// to make indexOf() tests more compact/readable, we prepend a space 
	// to the userAgent string (to get around '-1' indexOf() comparison)
	var ua = ' ' + n.userAgent.toLowerCase();
	var pl = n.platform.toLowerCase(); // not supported in NS3.0
	var an = n.appName.toLowerCase();

	// browser version
	this.version = n.appVersion;
	
    	this.nn = ua.indexOf('mozilla') > 0;

	// 'compatible' versions of mozilla aren't navigator
	if(ua.indexOf('compatible') > 0) {
		this.nn = false;
	}
  
	this.opera = ua.indexOf('opera') > 0;
	this.webtv = ua.indexOf('webtv') > 0;
	this.ie = ua.indexOf('msie') > 0;
	this.aol = ua.indexOf('aol') > 0;
	this.omniweb = ua.indexOf('omniweb') > 0;

	this.major = parseInt( this.version );
	this.minor = parseFloat( this.version );

	// platform
	this.mac = ua.indexOf('mac') > 0;
	this.win = ua.indexOf('win') > 0;
	this.win16 = (ua.indexOf('16') > 0 && ua.indexOf('win') > 0);
	this.win31 = this.win16;
	this.win95 = (ua.indexOf('95') > 0 && ua.indexOf('win') > 0);
	this.win98 = (ua.indexOf('98') > 0 && ua.indexOf('win') > 0);
	this.winme = (ua.indexOf('9x') > 0 && ua.indexOf('win') > 0);
	this.winnt4 = (ua.indexOf('nt') > 0 && ua.indexOf('win') > 0 && ua.indexOf('nt 5') <= 0 && ua.indexOf('nt 6') <= 0 && ua.indexOf('9x') <= 0);
	this.winxp = (ua.indexOf('5.1') > 0 && ua.indexOf('win') > 0);
	this.win2000 = (ua.indexOf('nt 5') > 0 && ua.indexOf('win') > 0 &! ua.indexOf('5.1') > 0);
	this.win2000orbetter = (ua.indexOf('nt 5') > 0 || ua.indexOf('nt 6') > 0 && ua.indexOf('win') > 0);

	this.os2 = ua.indexOf('os/2') > 0;
	this.sun = ua.indexOf('sunos') > 0;
	this.irix = ua.indexOf('irix') > 0;
	this.hpux = ua.indexOf('hpux') > 0;
	this.aix = ua.indexOf('aix') > 0;
	this.dec = (ua.indexOf('dec') > 0 || ua.indexOf('alpha') > 0 || ua.indexOf('osf1') > 0 || ua.indexOf('ultrix') > 0);
	this.sco = (ua.indexOf('sco') > 0 || ua.indexOf('unix_sv') > 0);
	this.vms = (ua.indexOf('vax') > 0 || ua.indexOf('openvms') > 0);
	this.linux = ua.indexOf('linux') > 0;
	this.sinix = ua.indexOf('sinix') > 0;
	this.reliant = ua.indexOf('reliantunix') > 0;
	this.freebsd = ua.indexOf('freebsd') > 0;
	this.openbsd = ua.indexOf('openbsd') > 0;
	this.netbsd = ua.indexOf('netbsd') > 0;
	this.bsd = ua.indexOf('bsd') > 0;
	this.unixware = ua.indexOf('unix_system_v') > 0;
	this.mpras = ua.indexOf('ncr') > 0;

	this.unix = ua.indexOf("x11") > 0;

	// workarounds
	// - IE5/6 reports itself as version 4.0

	if(this.ie && this.major == 4) {
		if (ua.indexOf("msie 5") > 0) {
			this.major = 5;
			var actual_index = ua.indexOf("msie 5");
			var actual_major = ua.substring(actual_index + 5, actual_index + 8);
			this.minor = parseFloat(actual_major);
		} else if (ua.indexOf("msie 6") > 0) {
			this.major = 6;
			var actual_index = ua.indexOf("msie 6");
			var actual_major = ua.substring(actual_index + 5, actual_index + 8);
			this.minor = parseFloat(actual_major);		
		}
	}

	return this;

}



var its = new its();