Tracking Keystrokes on Chromebook Tablet

Hello Heroes,

We have a module that simulates / forces multiselect functionality of an app using [ctrl] + [Mouse click]. We used Javascript to track the event, and it works perfectly on desktop, but it won't work on Chromebook Tablets. I tested the variable on stage to see if it even reads when I click the virtual keyboard on the tablet. No dice. Is there a way I can track tablet keystrokes utilizing Javascript? 

Below is the Javascript we used...

var player = GetPlayer();
var wrapper = document.querySelector("#wrapper");



if (wrapper.addEventListener)
{
    wrapper.addEventListener("mousedown", MouseDownHandler, false);
    wrapper.addEventListener("mouseup", MouseUpHandler, false);
    wrapper.addEventListener("DOMMouseDown", MouseDownHandler, false);
    wrapper.addEventListener("DOMMouseUp", MouseUpHandler, false);
}

else
{
    wrapper.attachEvent("onmousedown", MouseDownHandler);
    wrapper.attachEvent("onmouseup", MouseUpHandler);
}





function MouseDownHandler(e)
{
    var e = window.event || e;
if(e.ctrlKey==true){
    console.log('CTRL pressed during click');
    player.SetVar("isCTRLClicked",true);
}
    return false;
}

function MouseUpHandler(e)
{
    var e = window.event || e; 
    player.SetVar("isCTRLClicked",false);
    return false;
}

Thank you,

Emanuel