How to prevent use of previous JWS version

When I click on a URL that points to a JNLP file in my Internet Explorer Web browser, Java Web Start 1.2 is launched, even though I have installed Java Web Start 1.4.2 after installing Java Web Start 1.2. What is Internet Explorer using to determine which version of Java Web Start to launch?
I know I can control which Web Start version is used via a desktop shortcut, but is there a way to force Internet Explorer to use the latest version of Web Start?
Thanks in advance,
Mike

this can be done (for IE users only) in the web page before launching javaws. see:
http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/launch.html#ie, or
http://java.sun.com/j2se/1.5.0/docs/guide/plugin/developer_guide/version.html
but there is no general solution to cover other browsers.
You could use your jnlp file to insist on Java Web Start 1.5.0 or above by saying:
<jnlp spec="1.5+" codebase=...
but there is no such specification version for 1.4.2
You could start you app by checking for a System property set by javaws 1.4.2 ..., such as
"jnlpx.deployment.user.home" (this should only exist in 1.4.2, to check for later you coulc check: for "deployment.version")
/Dietz

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