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 only.
Example
Here is an example that shows how to list down all the plug-on 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>
Checking for Plug-Ins
Each plug-in has an entry in the array. Each entry has the following properties −
- name − is the name of the plug-in.
- filename − is the executable file that was loaded to install the plug-in.
- description − is a description of the plug-in, supplied by the developer.
- mimeTypes − is an array with one entry for each MIME type supported by the plug-in.
You can use these properties in a script to find out the installed plug-ins, and then using JavaScript, you can play appropriate multimedia file. Take a look at the following example.
<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 one real example which works in almost all the browsers −
<html><head><title>Using Embeded Object</title><script type ="text/javascript">functionplay(){if(!document.demo.IsPlaying()){
document.demo.Play();}}functionstop(){if(document.demo.IsPlaying()){
document.demo.StopPlay();}}functionrewind(){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"><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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