// Ultimate client-side JavaScript client sniff. // (C) Netscape Communications 1999. Permission granted to reuse and distribute. // Revised 17 May 99 to add is_nav5up and is_ie5up (see below). // Everything you always wanted to know about your JavaScript client // but were afraid to ask. Creates "is_" variables indicating: // (1) browser vendor: // is_nav, is_ie, is_opera // (2) browser version number: // is_major (integer indicating major version number: 2, 3, 4 ...) // is_minor (float indicating full version number: 2.02, 3.01, 4.04 ...) // (3) browser vendor AND major version number // is_nav2, is_nav3, is_nav4, is_nav4up, is_nav5, is_nav5up, is_ie3, is_ie4, is_ie4up // // Note: you don't want your Nav4 or IE4 code to "turn off" or // stop working when Nav5 and IE5 (or later) are released, so // in conditional code forks, use is_nav4up ("Nav4 or greater") // and is_ie4up ("IE4 or greater") instead of is_nav4 or is_ie4 // to check version in code which you want to work on future // versions. // 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('webtv')==-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_nav5 = (is_nav && (is_major == 5)); var is_nav5up = (is_nav && (is_major >= 5)); var is_ie = (agt.indexOf("msie") != -1); var is_ie3 = (is_ie && (is_major < 4)); var is_ie4 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-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_ie5up = (is_ie && !is_ie3 && !is_ie4); // KNOWN BUG: On AOL4, returns false if IE3 is embedded browser // or if this is the first browser window opened. Thus the // variables is_aol, is_aol3, and is_aol4 aren't 100% reliable. var is_aol = (agt.indexOf("aol") != -1); var is_aol3 = (is_aol && is_ie3); var is_aol4 = (is_aol && is_ie4); var is_opera = (agt.indexOf("opera") != -1); var is_webtv = (agt.indexOf("webtv") != -1); var is_mac = (agt.indexOf("mac")!=-1); var time = new Date(); randnum= (time.getTime()); if (!(is_ie4up)) { document.write(""); document.write("
"); }