function instalarPlugin() 
{
	if (window.external && ("AddSearchProvider" in window.external)) 
	{
   		// Firefox 2, IE 7, OpenSearch
   		window.external.AddSearchProvider("http://www.searchguy.com/searchplugin/searchguy_plugin.xml");
 	} 
	else if (window.sidebar && ("addSearchEngine" in window.sidebar)) 
	{
   		//Firefox <= 1.5, Sherlock
		window.sidebar.addSearchEngine("http://www.searchguy.com/searchplugin/searchguy_plugin.src",
                                  "http://www.searchguy.com/searchplugin/searchguy_ico_16.png",
                                  'Searchguy', 'General');
	} else 
	{
   	// Sin soporte para motores de búsqueda (IE 6, Opera, etc...).
	alert("Sorry, your browser don't support this searchbar.");
 	}
}