// convert all characters to lowercase to simplify testing
var agt = navigator.userAgent.toLowerCase();

    // *** BROWSER VERSION ***
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
    // If you want to allow spoofing, take out the tests for opera and webtv.
var is_nav = ((agt.indexOf("mozilla") != -1) && (agt.indexOf("spoofer") == -1) && (agt.indexOf("compatible") == -1) && (agt.indexOf("opera") == -1) && (agt.indexOf("firefox") == -1) && (agt.indexOf("webtv") == -1) && (agt.indexOf("hotjava") == -1));
var is_nav2 = (is_nav && (is_major == 2));
var is_nav3 = (is_nav && (is_major == 3));
var is_nav4 = (is_nav && (is_major == 4));
var is_nav4up = (is_nav && (is_major >= 4));
var is_navonly = (is_nav && ((agt.indexOf(";nav") != -1) || (agt.indexOf("; nav") != -1)));
var is_nav6 = (is_nav && (is_major == 5));
var is_nav6up = (is_nav && (is_major >= 5));
var is_gecko = (agt.indexOf("gecko") != -1);
var is_ff = (agt.indexOf("firefox") != -1);
var is_ff_1 = (is_ff && (agt.indexOf("Firefox/1.0") != -1));
var is_ff_1_5 = (is_ff && (agt.indexOf("Firefox/1.5") != -1));
var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie3 = (is_ie && (is_major < 4));
var is_ie4 = (is_ie && (is_major == 4) && (agt.indexOf("msie 4") != -1));
var is_ie4up = (is_ie && (is_major >= 4));
var is_ie5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0") != -1));
var is_ie5_5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") != -1));
var is_ie5up = (is_ie && !is_ie3 && !is_ie4);
var is_ie5_5up = (is_ie && !is_ie3 && !is_ie4 && !is_ie5);
var is_ie6 = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.") != -1));
var is_ie6up = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);

    // convert all characters to lowercase to simplify testing
var agt = navigator.userAgent.toLowerCase();

    // *** BROWSER VERSION ***
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
    // If you want to allow spoofing, take out the tests for opera and webtv.
var is_nav = ((agt.indexOf("mozilla") != -1) && (agt.indexOf("spoofer") == -1) && (agt.indexOf("compatible") == -1) && (agt.indexOf("opera") == -1) && (agt.indexOf("firefox") == -1) && (agt.indexOf("webtv") == -1) && (agt.indexOf("hotjava") == -1));
var is_nav2 = (is_nav && (is_major == 2));
var is_nav3 = (is_nav && (is_major == 3));
var is_nav4 = (is_nav && (is_major == 4));
var is_nav4up = (is_nav && (is_major >= 4));
var is_navonly = (is_nav && ((agt.indexOf(";nav") != -1) || (agt.indexOf("; nav") != -1)));
var is_nav6 = (is_nav && (is_major == 5));
var is_nav6up = (is_nav && (is_major >= 5));
var is_gecko = (agt.indexOf("gecko") != -1);
var is_ff = (agt.indexOf("firefox") != -1);
var is_ff_1 = (is_ff && (agt.indexOf("Firefox/1.0") != -1));
var is_ff_1_5 = (is_ff && (agt.indexOf("Firefox/1.5") != -1));
var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie3 = (is_ie && (is_major < 4));
var is_ie4 = (is_ie && (is_major == 4) && (agt.indexOf("msie 4") != -1));
var is_ie4up = (is_ie && (is_major >= 4));
var is_ie5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0") != -1));
var is_ie5_5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") != -1));
var is_ie5up = (is_ie && !is_ie3 && !is_ie4);
var is_ie5_5up = (is_ie && !is_ie3 && !is_ie4 && !is_ie5);
var is_ie6 = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.") != -1));
var is_ie6up = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);
var dotnet_ver = agt.match(/\.net clr [0-9.]+/g);
var is_dotnet = (dotnet_ver != null);
var is_dotnet1 = ((agt.indexOf(".net clr 1") != -1));
var is_dotnet2 = ((agt.indexOf(".net clr 2") != -1));