Hi

Thanks for the great component and documentation.

I did pick up on my side that every now and again the JS generates errors claiming that the getElementById(btnid) is NULL.

Could you perhaps adjust it a little bit so that the code checks first whether the object is NULL?

function setTimerInterval(btnid, time_ms) {

  return setInterval(

        function(){ 

                var btn = document.getElementById(btnid);

                if(btn !== null) btn.click();

        }, time_ms);

}