I am implementing buttons to launch scripts from a custom page. 

The simple way works, i.e.

  <input type=submit name=customscript value="run_script">

But I want to stay on the page. Copying "Customscript button without a page 
reload" from https://midas.triumf.ca/MidasWiki/index.php/Custom_Page_Features 
yields the following error:

Uncaught ReferenceError: XMLHttpRequestGeneric is not defined
    at cs_button (Trend:165)
    at HTMLInputElement.onclick (Trend:90)  

I included  <script src="mhttpd.js"></script> and call mhttpd_init on page load.

So why can`t it run this ajax request?


Or is there a better way to launch a script without messing up the page