var sUserAgent = navigator.userAgent;
var fAppVersion = parseFloat(navigator.appVersopn);

function compareVersions(sVersion1, sVersion2) {

	var aVersion1 = sVersion1.split(".");
	var aVersion2 = sVersion2.split(".");

	if (aVersion1.length > aVersion2.length) {
		for (var i=0; i<aVersion1.length - aVersion2.length; i++) {
			aVersion2.push("0");
		}
	}
	else {
		for (var i=0; i<aVersion2.length - aVersion1.length; i++) {
			aVersion1.push("0");
		}
	}

	for (var i=0; i<aVersion1.length; i++) {

		if (aVersion1[i] < aVersion2[i]) {
			return -1;
		}
		else if (aVersion1[i] > aVersion2[i]) {
			return 1;
		}
	}

	return 0;
}

var isOpera = false;
var isMinOpera4 = isMinOpera5 = isMinOpera6 = isMinOpera7 = isMinOpera7_5 = false;

var isKHTML = false;
var isMinSafari1 = isMinSafari1_2 = false;
var isMinKonq2_2 = isMinKonq3 = isMinKonq3_1 = isMinKonq3_2 = false;

// Internet Explorer
var isIE = sUserAgent.indexOf("compatible") > -1
           && sUserAgent.indexOf("MSIE") > -1
           && !isOpera;

var isMinIE4 = isMinIE5 = isMinIE5_5 = isMinIE6 = false;

if (isIE) {
	var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
	reIE.test(sUserAgent);
	var fIEVersion = parseFloat(RegExp["$1"]);

	isMinIE4 = fIEVersion >= 4;
	isMinIE5 = fIEVersion >= 5;
	isMinIE5_5 = fIEVersion >= 5.5;
	isMinIE6 = fIEVersion >= 6.0;
}

// Mozilla
var isMoz = sUserAgent.indexOf("Gecko") > -1
            && !isKHTML;

var isMinMoz1 = isMinMoz1_4 = isMinMoz1_5 = false;

if (isMoz) {
	var reMoz = new RegExp("rv:(\\d+\\.\\d+(?:\\.\\d+)?)");
	reMoz.test(sUserAgent);
	isMinMoz1   = compareVersions(RegExp["$1"], "1.0") >= 0;
	isMinMoz1_4 = compareVersions(RegExp["$1"], "1.4") >= 0;
	isMinMoz1_5 = compareVersions(RegExp["$1"], "1.5") >= 0;
}

// Cookies
var tmpcookie = new Date();
chkcookie = (tmpcookie.getTime() + '');
document.cookie = "chkcookie=" + chkcookie + "; path=/";
if (document.cookie.indexOf(chkcookie,0) < 0) {
	cookiesIsEnabled = false;
} else {
	cookiesIsEnabled = true;
}