/*
	General
	author: Közös
	lastmod: 2006.01.21.
	
	Általános függvények, változók, konstansok
*/



// IE vagy nem eldöntésre, pf.
var isIE = navigator.userAgent.match(/MSIE/) == "MSIE";

// Levélküldés a levélcím feltárása nélkül.
function level(_felhasznalo, _domen, _tema)
{
	if(_tema == undefined || _tema == null)
		window.top.location = "mailto:" + _felhasznalo + "@" + _domen;
	else
		window.top.location = "mailto:" + _felhasznalo + "@" + _domen + "?subject=" + _tema;
}


// A szöveg széleirol levágja a szóközöket
function trim(s)
{
	var rs = "";
	
	for(i = 0; i < s.length; i++)
	{
		if(s.charAt(i) != " ")
			break;
	}

	for(i2 = s.length-1; i2 > 0; i2--)
	{
		if(s.charAt(i2) != " ")
			break;
	}
	i2 += 1;
	
	rs = s.substring(i, i2);
	
	return rs;
}


/*
	String függvények
*/

//slasheket helyez el ahová kell, ',",\,0
function addslashes(str) 
{
	str=str.replace(/\'/g,'\\\'');
	str=str.replace(/\"/g,'\\"');
	str=str.replace(/\\/g,'\\\\');
	str=str.replace(/\0/g,'\\0');
	str=str.replace(/\n/g,'\\n');
	return str;
}


// a feleslegesen stringben hagyott slasheket szedi ki
function stripslashes(str) 
{
	str=str.replace(/\\'/g,'\'');
	str=str.replace(/\\"/g,'"');
	str=str.replace(/\\\\/g,'\\');
	str=str.replace(/\\0/g,'\0');
	str=str.replace(/\\n/g,'\n');
	return str;
}

//példány referencia lekérő függvény
function getReferenceOf(_instance)
{
	refof=eval(_instance);
	return refof;
}

// Jelszó entrópia
// 2 alapú logaritmus
function log2(_arg)
{
	return Math.log(_arg) / Math.log(2);
}

// Statisztikai entrópia
function entropy(_s)
{
	max = _s.length;
	chars = new Object();
	
	do
	{
		c = _s.charAt(0);
		if(chars.hasOwnProperty(c))
			chars[c]++;
		else
			chars[c] = 1;
		
		_s = _s.substr(1);
	}
	while(_s != "");

	e = 0;
	for(var c in chars)
	{
		r = chars[c] / max;
		e += r * log2(r);
	}
	
	e = -1 * e;
	
	return e;
}

// Jelszó entrópia
function password_entropy(_pass)
{
	// 
	return Math.round(100*entropy(_pass)*_pass.length/7)/100;
}

// Böngésző besorolása
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();