Re: How to inform web site visitor that Sun Java is required?

 Brcobrem <>
Mon, 25 Jun 2007 08:25:16 -0700
On Jun 21, 12:07 pm, Joshua Cranmer <> wrote:

On Thu, 21 Jun 2007 07:41:20 -0700,Brcobremwrote:

Re: How to inform web site visitor that Sun Java is required?


I hope this is the correct forum to make this post. If not, please let
me know.

I am by no means an expert html coder, but I can do enough to get small
jobs done. That said, I have a number of relatively simple web sites
that I developed (with FrontPage 2003) that require Java to display
certain components correctly. Is there some html code that I can insert
that would check if the user has Sun Java installed, and if they do not,
provide some kind of visual indication (perhaps a pop-up box) as
how/where to get Sun Java?

Thank you in advance your help on this.


There is no HTML you could write, but there is some JavaScript:

function checkSunJava() {
    if (java.lang.System.getProperty("java.vendor").indexOf("Sun") != 0)
        alert('This page requires Sun Java.');


Alternatively, if your requirement is merely that the person needs Java,
this should (untested) work:

<applet ...> <!-- Or object or whatever -->
This page requires Java to work properly.
</applet>- Hide quoted text -

- Show quoted text -

Hi Joshua,

Here's what I have on a web site below a section that begins with
<script type="text/javascript">

<p>JavaScript is required to view this email address

Now what that is causing in IE7 ( Internet Explorer v7 )is that when a
user enters that page, they get a "Internet Explorer" titled warning
box that says, "The page you are viewing uses Java. More information
on Java support is available from the Microsoft website." There is a
check box that says, "Do not show this message again." There is also a
"More Info" button that takes you to

On that "No Java Installed" page there is a link to
.. If you look at that page, I think you would agree that is would be
very (intentionally ?)confusing for the average user to figure out
what to do.

Now I finnaly understand what the .NET initiative is all about:
Microsoft vs Sun .


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