Thank you very much, this is exactly what I need and it works.

Zaher

> All functions in midas are controlled through special URLs. So the URL
> 
> http://<host:port>/?cmd=Start&value=10
> 
> will start run #10. Similarly with ?cmd=Stop. Now all you need is to set up a custom button, and use the 
> OnClick="" JavaScript method to fire off an Ajax request with the above URL. 
> 
> To send an Ajax request, you can use the function XMLHttpRequestGeneric which ships as part of midas in the 
> mhttpd.js file. Then the code would be
> 
> <input type="button" onclick="start()">
> 
> and in your JavaScript code:
> 
> ...
> function start()
> {
>    var request = XMLHttpRequestGeneric();
> 
>    url = '?cmd=Start&value=10';
>    request.open('GET', url, false);
>    request.send(null);
> }
> ...
> 
> 
> Cheers,
> Stefan