function showElement(e, helpId, xOffset, yOffset)
{
    var contextualHelp = document.getElementById(helpId);
    contextualHelp.style.top = ((e.clientY + document.documentElement.scrollTop + yOffset) + 'px');
    contextualHelp.style.left = ((e.clientX + xOffset) + 'px');
    contextualHelp.style.visibility = 'visible';
}

function hideElement(helpId)
{
    var contextualHelp = document.getElementById(helpId);
    contextualHelp.style.visibility = 'hidden';
}