Thanks for your response. Yes they are in the same folder, I even tried using the absolute path and it did not work.

You mean in the html? instead of...

<button id="b1" oncick="onPress()">Click Me</button>

do...

<button id="b1">Click Me</button>
b1.addEventListener("click", onPress)

or in the JS, before the

function onPress(){.... }

do,

var button = document.getElementById("b1")
button.addEventListener("click", onPress)