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The JavaScript navigator object includes a child object called plugins. This object is an array, with one entry for each plug-in installed on the browser. The navigator.plugins object is supported only by Netscape, Firefox, and Mozilla.
Example
The following example shows how to list down all the plug-ins installed in your browser.
<html>
<head>
<title>List of Plug-Ins</title>
</head>
<body>
<table border = "1">
<tr>
<th>Plug-in Name</th>
<th>Filename</th>
<th>Description</th>
</tr>
<script LANGUAGE = "JavaScript" type = "text/javascript">
for (i = 0; i<navigator.plugins.length; i++) {
document.write("<tr><td>");
document.write(navigator.plugins[i].name);
document.write("</td><td>");
document.write(navigator.plugins[i].filename);
document.write("</td><td>");
document.write(navigator.plugins[i].description);
document.write("</td></tr>");
}
</script>
</table>
</body>
</html>
Output
The following output is displayed on successful execution of the above code.
Checking for Plugins
Each plug-in has an entry in the array. Each entry has the following properties −
-
name − The name of the plug-in.
-
filename − The executable file that was loaded to install the plug-in.
-
description − A description of the plug-in, supplied by the developer.
-
mimeTypes − An array with one entry for each MIME type supported by the plugin.
You can use these properties in a script to find out the installed plug-ins, and then using JavaScript, you can play the appropriate multimedia file. Take a look at the following code.
<html>
<head>
<title>Using Plug-Ins</title>
</head>
<body>
<script language = "JavaScript" type = "text/javascript">
media = navigator.mimeTypes["video/quicktime"]; if (media) {
document.write("<embed src = ''quick.mov'' height = 100 width = 100>");
} else {
document.write("<img src = ''quick.gif'' height = 100 width = 100>");
}
</script>
</body>
</html>
Note − Here we are using HTML <embed> tag to embed a multimedia file.
Controlling Multimedia
Let us take a real example which works in almost all the browsers.
<html>
<head>
<title>Using Embeded Object</title>
<script type = "text/javascript">
<!--
function play() {
if (!document.demo.IsPlaying()) {
document.demo.Play();
}
}
function stop() {
if (document.demo.IsPlaying()){
document.demo.StopPlay();
}
}
function rewind() {
if (document.demo.IsPlaying()){
document.demo.StopPlay();
}
document.demo.Rewind();
}
//
-->
</script>
</head>
<body>
<embed id = "demo" name = "demo"
src = "http://www.amrood.com/games/kumite.swf"
width = "318" height = "300" play = "false" loop = "false"
pluginspage = "http://www.macromedia.com/go/getflashplayer"
swliveconnect = "true">
</embed>
<form name = "form" id = "form" action = "#" method = "get">
<input type = "button" value = "Start" onclick = "play();" />
<input type = "button" value = "Stop" onclick = "stop();" />
<input type = "button" value = "Rewind" onclick = "rewind();" />
</form>
</body>
</html>
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