JavaScript DHTML/Development/System Properties

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Get user"s operating system information

 
<html>
<head>
<script type="text/javascript">
function yourOS() {
    var ua = navigator.userAgent.toLowerCase();
    if (ua.indexOf("win") != -1) {
        return "Windows";
    } else if (ua.indexOf("mac") != -1) {
        return "Macintosh";
    } else if (ua.indexOf("linux") != -1) {
        return "Linux";
    } else if (ua.indexOf("x11") != -1) {
        return "Unix";
    } else {
        return "Computers";
    }
}
</script>
<body>
<h1>Welcome to GiantCo Computers</h2>
<h2>We love 
<script type="text/javascript">document.write(yourOS())</script>
<noscript>Computers</noscript>
Users!</h2>
</body>
</html>



OS (Operating system) name

<!-- 
     Example File From "JavaScript and DHTML Cookbook"
     Published by O"Reilly & Associates
     Copyright 2003 Danny Goodman
-->
var isWin = (navigator.userAgent.indexOf("Win") != -1);
var isMac = (navigator.userAgent.indexOf("Mac") != -1);
var isUnix = (navigator.userAgent.indexOf("X11") != -1);
----------
<script language="JavaScript" type="text/javascript">
document.write("<style type="text/css">");
document.write("body {font-size:" + ((isMac) ? "12" : "10") + "pt}");
document.write("</style>");
</script>
Источник — «http://wbex.ru/index.php?title=JavaScript_DHTML/Development/System_Properties&oldid=1858»