Zebra TC75 programm action on a button


where i work we use zebra tc 75 and all work fine.

we'd like to make a button programmable, for example the volume button.

for to explain,  we have a lockdown (mobicontrol), on this lockdown we have some icon (html link).

Each link opens an html page.

On this html page with have some input field.

Is it possible for example to click on a button on this html page by pressing the volume button ?

I've read that some button can be programmable but is it possible to fire a button on a html page ?

If yes, could you describe how i can do ?

thanks for all