I\'m trying to make a pop up box, which gets invoked on clicking a button, this is what I\'ve got so far.. http://jsfiddle.net/WGPhG/2/
Try This
function popUp(){
var popup = document.createElement('div');
popup.className = 'popup';
popup.id = 'test';
var cancel = document.createElement('div');
cancel.className = 'cancel';
cancel.setAttribute('onClick', 'document.getElementById("test").parentNode.removeChild('+popup +');')
popup.innerHTML = "This is a test message";
document.body.appendChild(popup);
popup.appendChild(cancel);
}