How do I use JavaScript to detect what browser someone is using?
Created May 4, 2012
Omar Khan Try this JavaScript code :-)
<SCRIPT LANGUAGE="JavaScript"> <!-- beginRollover = false; // This handles a bug in Nav4.0x that executes the code too quickly. // 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); 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_nav6 = (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_ie5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) ); var is_opera = (agt.indexOf("opera") != -1); var is_opera4 = (is_opera && (is_major == 4) && is_opera); function checkBrowser() { var version = "not recognised"; if (is_nav2) {version = "Navigator 2";} else if (is_nav3) {version = "Navigator 3";} else if (is_nav4) {version = "Navigator 4";} else if (is_nav6) {version = "Navigator 6";} else if (is_ie3) {version = "Internet Explorer 3";} else if (is_ie4) {version = "Internet Explorer 4";} else if (is_ie5) {version = "Internet Explorer 5";} else if (is_opera4) {version = "Opera 4";} return version; } browserVersion= checkBrowser(); alert("Your browser is: " + browserVersion); //--> </SCRIPT>