var browserType = navigator.userAgent;  //브라우저 종류
        var browser     = "";
        var version;                            //브라우저 버전
        var varsionLocation;                    //브라우저 버전 문자열 위치
        browserType = browserType.toLowerCase();

        var IE_VER = 6.0;
        var FIREFOX_VER = 2.0;
        var OPERA_VER = 9.0;
        var SAFARI_VER = 3.0;

        function browserFailure(){
			//alert("version failure!!");
			location.redirect("/en/sorry_not_support.page");
        }

        //IE
        if((versionLocation = browserType.indexOf("msie")) > -1) {
            browser = "msie";
            version = browserType.substr(versionLocation + browser.length + 1, 3);
            //alert(version);

            if(parseFloat(version) < IE_VER){
                browserFailure();
            }
        }

        //파이어폭스
        if((versionLocation = browserType.indexOf("firefox")) > -1) {
            browser = "firefox";
            version = browserType.substr(versionLocation + browser.length + 1, 3);
            //alert(version);

            if(parseFloat(version) < FIREFOX_VER){
                browserFailure();
            }
        }

        //오페라
        if((versionLocation = browserType.indexOf("opera")) > -1) {
            browser = "opera";
            version = browserType.substr(versionLocation + browser.length + 1, 3);
            //alert(version);

            if(parseFloat(version) < OPERA_VER){
                browserFailure();
            }
        }

        //사파리
        if((versionLocation = browserType.indexOf("safari")) > -1) {
            browser = "safari";
            version = browserType.substr(versionLocation - 6, 3);
            //alert(version);

            if(version < SAFARI_VER){
                browserFailure();
            }
        }