Hi, i need help for this error, I keep getting this error -->> "Unable to get value of the property 'innerHTML': object is null or undefined" when am running the program in IE & nothing is running in other web browsers... Below is the javascript (JScript.js) code: var output = document.getElementById('output'), pressed = {}; window.onkeydown = function (e) { if (pressed[e.which]) return; pressed[e.which] = e.timeStamp;}; window.onkeyup = function (e) { if (!pressed[e.which]) return; var duration = (e.timeStamp - pressed[e.which]) / 1000; output.innerHTML += '<p