Thread:Project:Support desk/I need html forms and Javascript in MediaWiki - Extension:CalcII doesn't work on newer MediaWiki Versions

Hello,

I need a tag extension for calculating in MediaWiki. I need an input field and an output (result) field. For calculating JavaScript should be ok. I found the extension calcII but it is for older MediaWiki-Versions. Can someone show me how to write a simple tag extension similar to calcII? I already read a lot about extensions but did't find out how to get JavaScript work to manipulate a form.

MediaWiki 1.19.3 PHP 5.3.3-7 MySQL 5.1.73-1

Thanks in advance! Karsten