<div>
The only way of checking is JavaScript under Netscape.<br />
<br />
--------------------------<wbr />----------<wbr />----<br />
<br />
&lt;script language=javascript&gt;<br />
function isPlugin(strPluginName) {<br />
&nbsp; &nbsp; for (i = 0; i &lt;&nbsp;navigator.plugins.length; i++) {<br />
&nbsp; &nbsp; &nbsp; &nbsp; if (navigator.plugins[i].name<wbr /> == strPluginName) return true<br />
&nbsp; &nbsp; }<br />
&nbsp; &nbsp; return false<br />
}<br />
document.write(isPlugin(&quot;A<wbr />dobe Acrobat&quot;))<br />
&lt;/script&gt;<br />
<br />
--------------------------<wbr />----------<wbr />----<br />
<br />
IE has the navigator.plugins object, too, but it is committed not to return any value.<br />
<br />
In ASP, one would be expecting to find plugins in the Request.ServerVariables collection (only), but there isn't.
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The only way of checking is JavaScript under Netscape.

----------------------------------------

<script language=javascript>
function isPlugin(strPluginName) {
    for (i = 0; i < navigator.plugins.length; i++) {
        if (navigator.plugins[i].name == strPluginName) return true
    }
    return false
}
document.write(isPlugin("Adobe Acrobat"))
</script>

----------------------------------------

IE has the navigator.plugins object, too, but it is committed not to return any value.

In ASP, one would be expecting to find plugins in the Request.ServerVariables collection (only), but there isn't.

<div>
C grade. Do you think, there could be an additional answer? I spent 30 minutes on that.<br />
Thanks, though.
</div>


C grade. Do you think, there could be an additional answer? I spent 30 minutes on that.
Thanks, though.

<div>
And, there was no additional comment, since the others accepted my comment as perfect.
</div>


And, there was no additional comment, since the others accepted my comment as perfect.

<div>
I have to assume that even most experienced coders had reviewed your question.
</div>


I have to assume that even most experienced coders had reviewed your question.

<div>
mgfranz, Marine, clockwatcher, mberumen, at least.
</div>


mgfranz, Marine, clockwatcher, mberumen, at least.

<div>
<div class="content wysiwyg-content">
How can you detect if a client pc has the Adobe Acrobat Reader plug-in installed when they click on a link to a PDF file? &nbsp;
</div>
</div>


How can you detect if a client pc has the Adobe Acrobat Reader plug-in installed when they click on a link to a PDF file?  

Detecting Adobe Reader

Web development software is used to create websites for both the Internet and intranets. Software can be either locally installed or operated through a cloud interface, and ranges in complexity from simple text editors to full-fledged integrated development environments (IDEs) that include graphics, video, audio, scripting and database support.

Web Development Software

Active Server Pages (ASP) is Microsoft’s first server-side engine for dynamic web pages. ASP’s support of the Component Object Model (COM) enables it to access and use compiled libraries such as DLLs. It has been superseded by ASP.NET, but will be supported by Internet Information Services (IIS) through at least 2022.