function hideDemo()
{
document.getElementById("overlay").style.display = "none";
document.getElementById("innerOverlay").style.display = "none";
document.getElementById("scormPlayer").style.display = "none";
document.body.style.overflow = "visible";
document.body.style.height = "0";
document.getElementById("scoFrame").src = "blank.htm";
}

function showDemo()
{
document.getElementById("overlay").style.display = "block";
document.getElementById("innerOverlay").style.display = "block";
document.getElementById("scormPlayer").style.display = "block";
document.body.style.overflow = "hidden";
document.body.style.height = "100%";
document.getElementById("scoFrame").src = "http://www.ukvirtual-college.co.uk/files/ukvc/109/demo/index.html";
}