Browser Plugins

Is there a way to check to see what plugins are loaded on a browser?

See documentation on the DOM, Plugin Object: Properties = Name, filename, description, length

function pluginReady(plugin){
for (var(i)=0; i<navigator.plugins.length; i++){
if(navigator.plugins[i].name.toLowerCase()
==plugin.toLowerCase()){ 
for (var j=0; j <navigator.plugins[i].length; j++){
if(navigator.plugins[i][j].enabledPlugin) {
return true
                   }
           }
     return false
   }       
}
return false
}       

Where parameter plugin = string equal to plugin's name as it appears boldfaced in About Plug-ins Listing from Netscape Navigator's help listing. It checks a given plugin and mime type. Also, check out Macromedia's explanation.