function Browseris() {
	var agt = navigator.userAgent.toLowerCase();
	
    this.osver = 1.0;
	if (agt){
		var stOSVer = agt.substring(agt.indexOf("windows ") + 11);
	    this.osver = parseFloat(stOSVer);
	}
	this.dom = ((document.getElementById) ? true : false);
	this.major = parseInt(navigator.appVersion);
	this.nav = ((agt.indexOf('mozilla') != -1) && 
				(agt.indexOf('spoofer') == -1) && 
				(agt.indexOf('compatible') == -1));
 	this.nav2 = (this.nav && (this.major == 2));
	this.nav3 = (this.nav && (this.major == 3));
	this.nav4 = (this.nav && (this.major == 4));
	this.nav6 = (this.nav && (this.major == 5));
	this.nav6up = (this.nav && (this.major >= 5));
	this.nav7up = false;
	if (this.nav6up){
		var navIdx = agt.indexOf("netscape/");
		if (navIdx >= 0 )
			this.nav7up = parseInt(agt.substring(navIdx+9)) >= 7;
	}
	this.ie = (agt.indexOf("msie") != -1);
	this.aol = (this.ie && agt.indexOf(" aol ") != -1);
	if (this.ie){
		var stIEVer = agt.substring(agt.indexOf("msie ") + 5);
		this.iever = parseInt(stIEVer);
		this.verIEFull = parseFloat(stIEVer);
	}else{
		this.iever = 0;
	}
	this.ie3 = (this.ie && (this.major == 2));
	this.ie4 = (this.ie && (this.major == 4));
	this.ie4up = (this.ie && (this.major >= 4));
	this.ie5up = (this.ie && (this.iever >= 5));
	this.ie55up = (this.ie && (this.verIEFull >= 5.5));
	this.ie6up = (this.ie && (this.iever >= 6));
    this.win16 = ((agt.indexOf("win16") !=- 1)
               || (agt.indexOf("16bit") !=- 1) || (agt.indexOf("windows 3.1") != -1)
               || (agt.indexOf("windows 16-bit") != -1));
    this.win31 = (agt.indexOf("windows 3.1") != -1) || (agt.indexOf("win16") != -1) ||
                 (agt.indexOf("windows 16-bit") != -1);
    this.win98 = ((agt.indexOf("win98") != -1)||(agt.indexOf("windows 98") != -1));
    this.win95 = ((agt.indexOf("win95") != -1)||(agt.indexOf("windows 95") != -1));
    this.winnt = ((agt.indexOf("winnt") != -1)||(agt.indexOf("windows nt") != -1));
    this.win32 = (this.win95 || this.winnt || this.win98 || 
                 ((this.major >= 4) && (navigator.platform == "Win32")) ||
                 (agt.indexOf("win32") != -1) || (agt.indexOf("32bit") != -1));
    this.os2   = ((agt.indexOf("os/2") != -1) 
                 || (navigator.appVersion.indexOf("OS/2") != -1)  
                 || (agt.indexOf("ibm-webexplorer") != -1));
    this.mac    = (agt.indexOf("mac") != -1);
    this.mac68k = (this.mac && ((agt.indexOf("68k") != -1) || 
                               (agt.indexOf("68000") != -1)));
    this.macppc = (this.mac && ((agt.indexOf("ppc") != -1) || 
                               (agt.indexOf("powerpc") != -1)));
    this.w3c = this.nav6up;
}

var browseris = new Browseris();