var agt=navigator.userAgent.toLowerCase();
var ie  = (agt.indexOf("msie") != -1);
var ns  = (navigator.appName.indexOf("Netscape") != -1);
var win = ((agt.indexOf("win")!=-1) || (agt.indexOf("32bit")!=-1));
var mac = (agt.indexOf("mac")!=-1);

if (ie && win) { pluginlist = detectIE("PDF.PdfCtrl.3","Acrobat Reader")+detectIE("PDF.PdfCtrl.4","Acrobat Reader")+detectIE("PDF.PdfCtrl.5","Acrobat Reader")+ detectIE("PDF.PdfCtrl.6","Acrobat Reader"); }
if (ns || !win) {
		nse = "";
		for (var i=0;i<navigator.mimeTypes.length;i++)
			nse += navigator.mimeTypes[i].type.toLowerCase();
		pluginlist = detectNS("application/pdf","Acrobat Reader");
}

function detectIE(ClassID,name) {
	result = false;
	document.write('<SCR'+'IPT LANGUAGE=VBScript>\n on error resume next \n result = IsObject(CreateObject("' + ClassID + '"))</SCR'+'IPT>\n');
	if (result) return name+',';
	else return '';
}
function detectNS(ClassID,name) {
	n = "";
	if (nse.indexOf(ClassID) != -1)
		if (navigator.mimeTypes[ClassID].enabledPlugin != null)
			n = name+",";
	return n;
}
if (pluginlist.length > 0) pluginlist = pluginlist.substring(0,pluginlist.length-1);