Automatic detection of installed version of Java WebStart

Question

Hi,
1) In my html file I detect if Java webStart is installed on the client machine
2) Is there a way to determine which version of Java webstart is installed?
eg: Let's say the client machine has Java WebStart 1.0.1.01 installed and Java webStart 1.0.2.01 is available and supported, is there a way to prompt the client to upgarde to the latest version of WebStart.
Is there a JavaScript or VBScript to detect installed version of Java WebStart?
Thanks

Answer 1

here is the detecting...
<SCRIPT LANGUAGE="JavaScript">
var javawsInstalled = 0;
var javaws12Installed = 0;
var javaws142Installed=0;
isIE = "false";
if (navigator.mimeTypes && navigator.mimeTypes.length) {
x = navigator.mimeTypes['application/x-java-jnlp-file'];
if (x) {
javawsInstalled = 1;
javaws12Installed=1;
javaws142Installed=1;
} else {
isIE = "true";
</SCRIPT>
<SCRIPT LANGUAGE="VBScript">
on error resume next
If isIE = "true" Then
If Not(IsObject(CreateObject("JavaWebStart.isInstalled"))) Then
javawsInstalled = 0
Else
javawsInstalled = 1
End If
If Not(IsObject(CreateObject("JavaWebStart.isInstalled.1.4.2.0"))) Then
javaws142Installed = 0
Else
javaws142Installed = 1
End If
End If
</SCRIPT>
and in the next page this is autdownload (for IE only)
<OBJECT CODEBASE="http://java.sun.com/products/plugin/autodl/jinstall-1_4_2-windows-i586.cab"
CLASSID="clsid:CAFEEFAC-0014-0002-0000-ABCDEFFEDCBA" HEIGHT="0" WIDTH="0">
<PARAM NAME="app" VALUE="/theapp.jnlp">
<PARAM NAME="back" VALUE="true">
<!-- Alternate HTML for browsers which cannot instantiate the object -->
<br>
<img src="get_java_blue-button.gif" width="88" height="31" border="0">
</OBJECT>