function openPopup(popupID)
{
var dHeight=document.documentElement.clientHeight;

document.getElementById('popupcontainer').style.height=dHeight;
document.getElementById('popupcontainer').style.display='';
document.getElementById(popupID).style.display='';
}

function closePopup(popupID)
{
document.getElementById('popupcontainer').style.display='none';
document.getElementById(popupID).style.display='none';
}