var helpPopup = window.createPopup();
function showHelp(helpID) {
            divHelp = document.getElementById(helpID);
            
            var helpPopBody = helpPopup.document.body;
            helpPopBody.style.backgroundColor = 'lightyellow';
            helpPopBody.style.border = 'solid black 1px';
            helpPopBody.style.padding = '5px';
            helpPopBody.style.fontFamily = 'Arial';
            helpPopBody.style.fontSize = '12px';
            helpPopBody.innerHTML = divHelp.innerHTML;

            // this hidden popup is used to calculate the height
            helpPopup.show(0, -80, 220, 0);
            
            var realHeight = helpPopBody.scrollHeight-1;
            // Hides the dimension detector popup object.
            helpPopup.hide();
    
            // Shows the actual popup object with correct height.
            helpPopup.show(0, -80, 220, realHeight, event.srcElement);            
        }
        
function hideHelp(helpID) {
            helpPopup.hide();
        }