detection of the pdf-reader plugin

Is there a way to detect if the browser has installed a pdf-viewer plug-in?

I have some pdf-files, and I want users requesting them redirected to a "you need the pdf-reader plug-in" page if they cannot view pdf-files.

Thanks in advance,
Guttorm.

I have no experience with it but have you tried:

plugin.description (JavaScript 1.1)
navigation.plugins (JavaScript 1.1)

plugs=navigator.plugins;
len = plugs.length;
for (i=0; i<len; i++) {
MimeType = plugs[i];
text = "Plugin "+i+" supports MimeType: '"+MimeType.type+"'";
window.alert(text)
}

Ulf

Thanks a lot. I was able to make a function to detect the plug-in that looks like this:

function PdfMimeOk()
{
if (navigator.appName == "Netscape") {
i = navigator.mimeTypes.length;
while (i--) {
if (navigator.mimeTypes[i].suffixes == "pdf")
return true;
}
}
return false;
}

This works fine in Netscape (therefore the check), but in Internet Explorer, the navigator.mimeTypes (as well as the navigator.plugins) arrays are always empty.

Any ideas what to do in Internet Explorer?