/****************************/
/* Riconoscimento Browser	*/
/* Sistema Operativo e		*/
/* parametri di sistema		*/
/****************************/

function Is() {
	var agent = navigator.userAgent.toLowerCase();
	this.nav = navigator.appName.toLowerCase();
	this.agt = agent;
	this.os = navigator.platform.toLowerCase();	
	this.major = parseInt(navigator.appVersion);
	this.minor = parseFloat(navigator.appVersion);
	this.dom = document.getElementById?true:false;
	this.style = document.styleSheets?true:false;
	this.lang = navigator.language? navigator.language : navigator.browserLanguage; //Lingua
	
	//Risoluzione dello schermo
	this.width = screen.width;
	this.height = screen.height;
	//(screen.availHeight)? : ; if(typeof(screen.availWidth)!="undefined");
	
	//Dimensione finestra
	//[...]
	//innerWidth innerHeight outerWidth outerHeight

	//Browser Netscape/Mozilla/Gecko (Versioni)	
	this.ns  = ((agent.indexOf('mozilla')!=-1) && (agent.indexOf('spoofer')==-1) && (agent.indexOf('compatible') == -1) && (agent.indexOf('opera')==-1) && (agent.indexOf('webtv')==-1) && (agent.indexOf('hotjava')==-1));
  //this.ns  = ((agent.indexOf('mozilla')!=-1) && ((agent.indexOf('spoofer')==-1) && (agent.indexOf('compatible') == -1)));
    this.ns2 = (this.ns && (this.major == 2));
    this.ns3 = (this.ns && (this.major == 3));
    this.ns4 = (this.ns && (this.major == 4) && (this.major <= 5));
    this.ns4b = (this.ns && (this.major == 4) && (this.minor <= 4.03));
    this.ns45 = (this.ns && (this.minor >= 4.5) && (this.minor <= 4.51));
    this.ns4up = (this.ns && (this.major >= 4));
    this.navonly = (this.ns && ((agent.indexOf(";nav") != -1) || (agent.indexOf("; nav") != -1)));
    this.ns5 = (this.ns && (this.major == 5));
    this.ns6 = (this.ns && this.dom && (this.major == 5) && (agent.indexOf("netscape6/6")!=-1));
    this.ns6up = (this.ns && this.dom && (this.major >= 5));
    this.ns7 = (this.ns && this.dom && (this.major == 5) && (agent.indexOf("netscape/7")!=-1));
    this.gecko = (agent.indexOf('gecko') != -1);

	//Browser Explorer (Versioni)
    this.ie     = ((agent.indexOf("msie") != -1) && (agent.indexOf("opera")==-1));  
    this.ie3    = (this.ie && (this.major < 4));  //this.ie3  = (this.ie && (this.major == 2));
    this.ie4only    = (this.ie && (this.major == 4) && (agent.indexOf("msie 4")!=-1));
    this.ie4  	= (this.ie && (this.major >= 4)); //for compatibility with old glamm scripts
    this.ie4up  = (this.ie && (this.major >= 4));
    this.ie5    = (this.ie && (this.major == 4) && (agent.indexOf("msie 5.0")!=-1));
    this.ie5up  = (this.ie && !this.ie3 && !this.ie4only);
    this.ie55   = (this.ie && (this.major == 4) && (agent.indexOf("msie 5.5")!=-1));    
    this.ie55up =(this.ie && !this.ie3 && !this.ie4only && !this.ie5);
    this.ie6    = (this.ie && (this.major == 4) && (agent.indexOf("msie 6.")!=-1));
    this.ie6up  = (this.ie && !this.ie3 && !this.ie4only && !this.ie5 && !this.ie55);
    
    //Browser Aol (Versioni)    
    this.aol   = (agent.indexOf("aol") != -1);
    this.aol3  = (this.aol && this.ie3);
    this.aol4  = (this.aol && this.ie4);
    this.aol5  = (agent.indexOf("aol 5") != -1);
    this.aol6  = (agent.indexOf("aol 6") != -1);
	// KNOWN BUG: On AOL4, returns false if IE3 is embedded browser or if this is the first browser window opened.
	//Thus the variables this.aol, this.aol3, and this.aol4 aren't 100% reliable.
	
	//Browser Opera (Versioni)
    this.op  = (agent.indexOf("opera") != -1);
    this.op2 = (agent.indexOf("opera 2") != -1 || agent.indexOf("opera/2") != -1);
    this.op3 = (agent.indexOf("opera 3") != -1 || agent.indexOf("opera/3") != -1);
    this.op4 = (agent.indexOf("opera 4") != -1 || agent.indexOf("opera/4") != -1);
    this.op5 = (agent.indexOf("opera 5") != -1 || agent.indexOf("opera/5") != -1);
    this.op5up = (this.op && !this.op2 && !this.op3 && !this.op4);
    /*
    this.op3 = (agent.indexOf("opera") != -1 && (this.major < 4));
	this.op4 = (agent.indexOf("opera") != -1 && (this.major >= 4));
	*/
	
	//Browser Web TV
    this.webtv = (agent.indexOf("webtv") != -1); 
    this.TVNavigator = ((agent.indexOf("navio") != -1) || (agent.indexOf("navio_aoltv") != -1)); 
    this.AOLTV = this.TVNavigator;
	
	//Browser HotJava
    this.hotjava = (agent.indexOf("hotjava") != -1);
    this.hotjava3 = (this.hotjava && (this.major == 3));
    this.hotjava3up = (this.hotjava && (this.major >= 3));
	
	//Javascript (Versioni)
    if (this.ns2 || this.ie3) this.js = 1.0;
    else if (this.ns3) this.js = 1.1;
    else if (this.op5up) this.js = 1.3;
    else if (this.op) this.js = 1.1;
    else if ((this.ns4 && (this.minor <= 4.05)) || this.ie4only) this.js = 1.2;
    else if ((this.ns4 && (this.minor > 4.05)) || this.ie5) this.js = 1.3;
    else if (this.hotjava3up) this.js = 1.4;
    else if (this.ns6 || this.gecko) this.js = 1.5;
    // NOTE: In the future, update this code when newer versions of JS
    // are released. For now, we try to provide some upward compatibility
    // so that future versions of Nav and IE will show they are at
    // *least* JS 1.x capable. Always check for JS version compatibility
    // with > or >=.
    else if (this.ns6up) this.js = 1.5;
    // note ie5up on mac is 1.4
    else if (this.ie5up) this.js = 1.3
    // HACK: no idea for other browsers; always check for JS version with > or >=
    else this.js = 0.0;

	//Sistema Operativo
    this.win   = ( (agent.indexOf("win")!=-1) || (agent.indexOf("16bit")!=-1) );
    // NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on all Win32, so you can't distinguish between Win95 and WinNT.
    this.win95 = ((agent.indexOf("win95")!=-1) || (agent.indexOf("windows 95")!=-1));
    // is this a 16 bit compiled version?
    this.win16 = ((agent.indexOf("win16")!=-1) || (agent.indexOf("16bit")!=-1) || (agent.indexOf("windows 3.1")!=-1) || (agent.indexOf("windows 16-bit")!=-1) );
    this.win31 = ((agent.indexOf("windows 3.1")!=-1) || (agent.indexOf("win16")!=-1) || (agent.indexOf("windows 16-bit")!=-1));
    this.winme = ((agent.indexOf("win 9x 4.90")!=-1));
    this.win2k = ((agent.indexOf("windows nt 5.0")!=-1));
    // NOTE: Reliable detection of Win98 may not be possible. It appears that:
    //       - On Nav 4.x and before you'll get plain "Windows" in userAgent.
    //       - On Mercury client, the 32-bit version will return "Win98", but the 16-bit version running on Win98 will still return "Win95".
    this.win98 = ((agent.indexOf("win98")!=-1) || (agent.indexOf("windows 98")!=-1));
    this.winnt = ((agent.indexOf("winnt")!=-1) || (agent.indexOf("windows nt")!=-1));
    this.win32 = (this.win95 || this.winnt || this.win98 || ((this.major >= 4) && (this.os == "win32")) || (agent.indexOf("win32")!=-1) || (agent.indexOf("32bit")!=-1));

    this.os2   = ((agent.indexOf("os/2")!=-1) || (navigator.appVersion.indexOf("OS/2")!=-1) || (agent.indexOf("ibm-webexplorer")!=-1));

    this.mac    = (agent.indexOf("mac")!=-1);
    // hack ie5 js version for mac
    if (this.mac && this.ie5up) this.js = 1.4;
    this.mac68k = (this.mac && ((agent.indexOf("68k")!=-1) || (agent.indexOf("68000")!=-1)));
    this.macppc = (this.mac && ((agent.indexOf("ppc")!=-1) || (agent.indexOf("powerpc")!=-1)));

    this.sun   = (agent.indexOf("sunos")!=-1);
    this.sun4  = (agent.indexOf("sunos 4")!=-1);
    this.sun5  = (agent.indexOf("sunos 5")!=-1);
    this.suni86= (this.sun && (agent.indexOf("i86")!=-1));
    this.irix  = (agent.indexOf("irix") !=-1);    // SGI
    this.irix5 = (agent.indexOf("irix 5") !=-1);
    this.irix6 = ((agent.indexOf("irix 6") !=-1) || (agent.indexOf("irix6") !=-1));
    this.hpux  = (agent.indexOf("hp-ux")!=-1);
    this.hpux9 = (this.hpux && (agent.indexOf("09.")!=-1));
    this.hpux10= (this.hpux && (agent.indexOf("10.")!=-1));
    this.aix   = (agent.indexOf("aix") !=-1);      // IBM
    this.aix1  = (agent.indexOf("aix 1") !=-1);    
    this.aix2  = (agent.indexOf("aix 2") !=-1);    
    this.aix3  = (agent.indexOf("aix 3") !=-1);    
    this.aix4  = (agent.indexOf("aix 4") !=-1);    
    this.linux = (agent.indexOf("inux")!=-1);
    this.sco   = (agent.indexOf("sco")!=-1) || (agent.indexOf("unix_sv")!=-1);
    this.unixware = (agent.indexOf("unix_system_v")!=-1); 
    this.mpras    = (agent.indexOf("ncr")!=-1); 
    this.reliant  = (agent.indexOf("reliantunix")!=-1);
    this.dec   = ((agent.indexOf("dec")!=-1) || (agent.indexOf("osf1")!=-1) || (agent.indexOf("dec_alpha")!=-1) || (agent.indexOf("alphaserver")!=-1) || (agent.indexOf("ultrix")!=-1) || (agent.indexOf("alphastation")!=-1));
    this.sinix = (agent.indexOf("sinix")!=-1);
    this.freebsd = (agent.indexOf("freebsd")!=-1);
    this.bsd = (agent.indexOf("bsd")!=-1);
    this.unix  = ((agent.indexOf("x11")!=-1) || this.sun || this.irix || this.hpux || this.sco || this.unixware || this.mpras || this.reliant || this.dec || this.sinix || this.aix || this.linux || this.bsd || this.freebsd);

    this.vms   = ((agent.indexOf("vax")!=-1) || (agent.indexOf("openvms")!=-1));
}

var is;
var isIE3Mac = false;
// this section is designed specifically for IE3 for the Mac
if ((navigator.appVersion.indexOf("Mac")!=-1) && (navigator.userAgent.indexOf("MSIE")!=-1) && (parseInt(navigator.appVersion)==3))
       isIE3Mac = true;
else   is = new Is();

function test_is() {
	var testis = "";
	for(var i in is)
		testis += " " + i + " = " + eval("is."+i) + "\n";
	alert(testis);
}
//test_is();