구글크롬 0.2
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/0.2.149.27 Safari/525.13:
=>Netscape

사파리  3.1.2
Mozilla/5.0 (Windows; U; Windows NT 6.0; ko-KR) AppleWebKit/525.19 (KHTML, like Gecko) Version/3.1.2 Safari/525.21:
=>Netscape

Firefox 3
Mozilla/5.0 (Windows; U; Windows NT 6.0; ko; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1:
=>5

IE7
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506):
=>4

Opera 9.52
Opera/9.52 (Windows NT 6.0; U; ko):
=>Opera

/**
 * @fileoverview 브라우저비교 및 JS상속, 클래스 생성관련 스크립트 모음
 * @author 데꾸벅
 * @version 0.1
 * @since 2003.05.08, 2008.08.27 IE6 판별 버그 수정, 2008.09.03 Google Chrome 판별 추가
 */


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

/**
 * 브라우저 버전 비교
 */
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 if (aVersion1.length < aVersion2.length) {
        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;
}



//Opera
var isOpera = sUserAgent.indexOf("Opera") > -1;
var isOpera7 = isOpera8 = isOpera9 =isOpera10 = false;
if (isOpera) {
    if (/Opera[\/\s](\d+\.\d+)/.test(navigator.userAgent)){
     var oprversion=new Number(RegExp.$1);
     if (oprversion>=10) isOpera10 = true;
     else if (oprversion>=9) isOpera9 = true;
     else if (oprversion>=8) isOpera8 = true;
     else if (oprversion>=7) isOpera7 = true;
    }
}




//KHTML, Konqueror
var isKHTML = sUserAgent.indexOf("KHTML") > -1 || sUserAgent.indexOf("Konqueror") > -1  || sUserAgent.indexOf("AppleWebKit") > -1;

var isSafari1 = isSafari1_2 = false;
var isKonq2_2 = isKonq3 = isKonq3_1 = isKonq3_2 = false;
var isSafari = false;
if (isKHTML) {
    isSafari = sUserAgent.indexOf("AppleWebKit") > -1;
    isKonq = sUserAgent.indexOf("Konqueror") > -1;

    if (isSafari) {
        var reAppleWebKit = new RegExp("AppleWebKit\\/(\\d+(?:\\.\\d*)?)");
        reAppleWebKit.test(sUserAgent);
        var fAppleWebKitVersion = parseFloat(RegExp["$1"]);
        isSafari1 = fAppleWebKitVersion >= 85;
        isSafari1_2 = fAppleWebKitVersion >= 124;
    } else if (isKonq) {
        var reKonq = new RegExp("Konqueror\\/(\\d+(?:\\.\\d+(?:\\.\\d)?)?)");
        reKonq.test(sUserAgent);
        isKonq2_2 = compareVersions(RegExp["$1"], "2.2") >= 0;
        isKonq3 = compareVersions(RegExp["$1"], "3.0") >= 0;
        isKonq3_1 = compareVersions(RegExp["$1"], "3.1") >= 0;
        isKonq3_2 = compareVersions(RegExp["$1"], "3.2") >= 0;
    }
}


// Internet Explorer
var isIE = sUserAgent.indexOf("compatible") > -1 && sUserAgent.indexOf("MSIE") > -1 && !isOpera;
var isIE4 = isIE5 = isIE5_5 = isIE6 = isIE7 = isIE8 = false;
if (isIE) {
    var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
    reIE.test(sUserAgent);
    var fIEVersion = parseFloat(RegExp["$1"]);
    isIE4 = fIEVersion >= 4  && fIEVersion < 5;
    isIE5 = fIEVersion >= 5  && fIEVersion < 5.5;
    isIE5_5 = fIEVersion >= 5.5  && fIEVersion < 6.0;
    isIE6 = fIEVersion >= 6.0 && fIEVersion < 7.0;
    isIE7 = fIEVersion >= 7.0 && fIEVersion < 8.0;
    isIE8 = fIEVersion >= 8.0 ;
}


// Mozilla 여부
var isMoz = sUserAgent.indexOf("Gecko") > -1 && !isKHTML;
var isMoz1 = sMoz1_4 = isMoz1_5 = false;

if (isMoz) {
    var reMoz = new RegExp("rv:(\\d+\\.\\d+(?:\\.\\d+)?)");
    reMoz.test(sUserAgent);
    isMoz1 = compareVersions(RegExp["$1"], "1.0") >= 0;
    isMoz1_4 = compareVersions(RegExp["$1"], "1.4") >= 0;
    isMoz1_5 = compareVersions(RegExp["$1"], "1.5") >= 0;
}

var isNS4 = !isIE && !isOpera && !isMoz && !isKHTML && (sUserAgent.indexOf("Mozilla") == 0) && (navigator.appName == "Netscape") && (fAppVersion >= 4.0 && fAppVersion < 5.0);
var isNS4 = isNS4_5 = isNS4_7 = isNS4_8 = false;

if (isNS4) {
    isNS4 = true;
    isNS4_5 = fAppVersion >= 4.5;
    isNS4_7 = fAppVersion >= 4.7;
    isNS4_8 = fAppVersion >= 4.8;
}


var isFF = !isIE && !isOpera && isMoz && !isKHTML && (sUserAgent.indexOf("Mozilla") == 0) && (navigator.appName == "Netscape");
var isFF1 = isFF2 = isFF3 = false;
if(isFF){
    if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)){
     var ffversion=new Number(RegExp.$1);
     if (ffversion>=3)
          isFF3 = true;
     else if (ffversion>=2)
         isFF2 = true;
     else if (ffversion>=1)
          isFF1 = true;
    }
}


//구글 크롬 버전체크 추가 2008.09.03
var isChrome = !isIE && !isFF && !isOpera && !isMoz && !isKonq && isSafari && isKHTML && (sUserAgent.indexOf("Mozilla") == 0) && (sUserAgent.indexOf("Chrome") != -1) && (navigator.appName == "Netscape");
var isChrome02 = false;

if(isChrome){
    if (/Chrome[\/\s](\d+\.\d+)/.test(navigator.userAgent)){
        var ffversion=new Number(RegExp.$1);
        if(parseFloat(ffversion) >= parseFloat('0.2'))
            isChrome02 = true;
    }
}


/**
 * XP인지 아닌지 판별함수
 * @return {boolean} true/false
 */
function isXP(){
    var agent = window.navigator.userAgent;
    if(agent.indexOf("MSIE")!= -1 && agent.indexOf("5.1") !=-1)
        return true;     //SP1
    else
        return false;
}

/**
 * XP의 ServicePack2인지 처리함수
 * @return {boolean} true/false
 */
function isXPSP2(){
    var tmp_MSIE = window.navigator.userAgent.indexOf("MSIE");
    if(tmp_MSIE && window.navigator.userAgent.indexOf("SV1") > tmp_MSIE){
        return true;     //SP2
    }else{
        return false;
    }
}