var pluginSvg=new Object();
var pluginPdf=new Object();
var pluginJava=new Object();

var NOT_INSTALLED = 0;
var WRONG_VERSION = -1;
var INSTALLED = 1;

/**
 * Fonction trouvée sur internet et quelque peu modifiée.
 * http://forum.java.sun.com/thread.jspa?threadID=536912&messageID=2597230
 *
 * Determines if the Java plugin with the required version number is
 * installed for use in the browser.
 * @param requiredVersion the minimum version number required - must only
 * consist of major and minor version, with no patch version (that means
 * n1.n2.n3 is in 1.4.2 - do NOT use 1.4.2_04). If minor version is 0, do not
 * include (i.e. give 1.3 instead of 1.3.0)
 * @return NOT_INSTALLED if no Java plugin detected, INSTALLED if plugin
 * detected and correct version, WRONG_VERSION if installed but wrong
 * version
 */
function isJavaPluginInstalled(requiredVersion) {
	if (!requiredVersion) requiredVersion = "1.5";
	if (navigator.userAgent.indexOf("MSIE") != -1) {
		// MSIE plugin lookup
		try {
			var plugin = new ActiveXObject("JavaPlugin");
			if (plugin) {
				// so now we know we have the plugin - let's see if we have the minimum version
				// Since both Sun and MS are idiots about actually documenting any of this
				// stuff, we'll have to "brute-force" a maximum version number
				// n1.n2 - major version number
				// n3 - minor version (maintainance version)
				// n4n5 - patch version

				var curr = -1;
				for (var n1 = 1; n1 >= 1 && curr == -1; --n1) {
					for (var n2 = 8; n2 >= 0 && curr == -1; --n2) {
						for (var n3 = 9; n3 >= 0 && curr == -1; --n3) {
							for (var n4 = 9; n4 >= 0 && curr == -1; --n4) {
								for (var n5 = 9; n5 >= 0 && curr == -1; --n5) {
									var version = "" + n1 + n2 + n3 + "_" + n4 + n5;
//									var version = "" + n1 + n2 + n3;
									try {
										var versioned = new ActiveXObject("JavaPlugin." + version);
										curr = new Number("" + n1 + n2 + n3);
									} catch (e) {
										continue;
									}
								}
							}
						}
					}
				}
				// don't know how we could've missed it, but this is the
				// bare minimum version possible (version 1.2)
				if (curr == null) curr = "120";

				var array = requiredVersion.split(".");
				var convert = new Number(array[0]) * 100;
				if (array.length > 1) convert += new Number(array[1]) * 10;
				if (array.length > 2) convert += new Number(array[2]);

				if (curr >= convert)
					return INSTALLED;
				else
					return WRONG_VERSION;
			}
			return NOT_INSTALLED;
		} catch (e) {
			return NOT_INSTALLED
		}
	} else {
		// NS/Mozilla (presumably other) plugin lookup
		var wrong_version = false;
		for (var i = 0; i < navigator.mimeTypes.length; ++i) {
			var mime_type = navigator.mimeTypes[i];
			if (mime_type.type == "application/x-java-applet;version=" + requiredVersion) return INSTALLED;
			if (mime_type.type.match(/^application\/x-java-applet;version=/)) wrong_version = true;
		}
		if (wrong_version) return WRONG_VERSION;
		return NOT_INSTALLED;
	}
}

function detect_mandatory_plugins() {

	pluginSvg.installed=false;
	pluginSvg.version='0.0';
	pluginPdf.installed=false;
	pluginPdf.version='0.0';

	if (navigator.plugins && navigator.plugins.length)
	{
		pluginSvg.installed=true;
		pluginSvg.version='3.0';
		for (index = 0; index < navigator.plugins.length; index++)
		{
			if (navigator.plugins[index].name == "Adobe Acrobat")
			{
				pluginPdf.version=parseFloat(navigator.plugins[index].description.split('Version ')[1]);
				if (pluginPdf.version.toString().length == 1) 
				{
					pluginPdf.version+='.0';
				}
				pluginPdf.installed=true;
			}
		}
	}
	else 
	{
		if (window.ActiveXObject)
		{
			for (version=1; version<10; version++)
			{
				try
				{
					if (eval("new ActiveXObject('Adobe.SVGCtl."+version+"');"))
					{
						pluginSvg.installed=true;
						pluginSvg.version=version+'.0';
					}
				}
				catch(e) {}
				try
				{
					if (eval("new ActiveXObject('PDF.PdfCtrl."+version+"');"))
					{
						pluginPdf.installed=true;
						pluginPdf.version=version+'.0';
					}
				}
				catch(e) {}
			}

			try	
			{
				if (new ActiveXObject('PDF.PdfCtrl.1'))
				{
					pluginPdf.installed=true;
					pluginPdf.version='4.0';
				}
			}
			catch(e) {}
	
			try
			{
				if (new ActiveXObject('AcroPDF.PDF.1'))
				{
					pluginPdf.installed=true;
					pluginPdf.version='7.0';
				}
			}
			catch(e) {}
		}
	}
}

function detect_optional_plugins() {
	var java_installed = isJavaPluginInstalled('1.5');
	if (java_installed == INSTALLED)
		pluginJava.installed = true;
}

function are_mandatory_plugins_installed() {
	detect_mandatory_plugins();
	return (pluginSvg.installed && pluginPdf.installed && pluginPdf.version >= 7)
}

function afficheEtatPlugin()
{
	detect_mandatory_plugins();
	detect_optional_plugins();

	if (pluginSvg.installed)
	{
		document.getElementById("svgOK").style.display='';
	}
	else
	{ 
		document.getElementById("svgNOK").style.display='';
		document.getElementById("svgIcone").style.display='';
		document.getElementById("svgAide").style.display='';
	}
	if (pluginPdf.installed && pluginPdf.version >= 7)
	{
		document.getElementById("pdfOK").style.display='';		
	}
	else
	{ 
		document.getElementById("pdfNOK").style.display='';
		document.getElementById("pdfIcone").style.display='';
		document.getElementById("pdfAide").style.display='';
	}
	if (pluginJava.installed)
	{
		document.getElementById("javaOK").style.display='';
	}
	else
	{ 
		document.getElementById("javaNOK").style.display='';
		document.getElementById("javaIcone").style.display='';
		document.getElementById("javaAide").style.display='';
	}
	
	if(document.getElementById("svgNOK").style.display=='' || document.getElementById("swfNOK").style.display==''
		&& document.getElementById("pdfNOK").style.display=='' || document.getElementById("javaNOK").style.display==''){
		document.getElementById("installation").style.visibility='visible';
	}
		
}