# Detecting if a user has JRE installed using Javascript

**URL:** <https://forum.kirupa.com/t/detecting-if-a-user-has-jre-installed-using-javascript/144506>\
**Category:** Uncategorized\
**Created:** [April 14, 2005, 8:19pm UTC](https://forum.kirupa.com/t/detecting-if-a-user-has-jre-installed-using-javascript/144506 "2005-04-14T20:19:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![FlashNewby](https://avatars.discourse-cdn.com/v4/letter/f/5f8ce5/32.png) [@FlashNewby](https://forum.kirupa.com/u/FlashNewby)\
**Post date:** [April 14, 2005, 8:19pm UTC](https://forum.kirupa.com/t/detecting-if-a-user-has-jre-installed-using-javascript/144506/1 "2005-04-14T20:19:34Z")

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Hi  
I have an applet on my page and I was testing it on another pc and the applet did not display. I want to be able to detect if a user has the JRE installed so that I can popup a message telling them where they can download the jre in order for the applet to display.

Oh by the way I did check internet options to see if there was an option setting for applet. If this box is unchecked will this prevent the applet from showing.

Thanks