function displayOverlay(overlay,item)
{
    var overlayYOffset = 10;
    var overlayXOffset = 10;
    
    var sourceItem = $get(overlay + "Item" + item)
    
    var overlayItem = $get(overlay + item);

    var b1 = Sys.UI.DomElement.getBounds(sourceItem);

    //alert(b1.width + "\n" + b1.height + "\n" + b1.x + "\n" + b1.y);
    
    var b2 = Sys.UI.DomElement.getBounds(overlayItem);
    
    //alert(b2.width + "\n" + b2.height + "\n" + b2.x + "\n" + b2.y);

    Sys.UI.DomElement.setLocation(overlayItem, ((b1.x-b2.width)+overlayXOffset), ((b1.y-b2.height)-b1.height-overlayYOffset));
 
    //Sys.UI.DomElement.setLocation(overlayItem, 450, 170);
    
    overlayItem.style.visibility = "visible";
    overlayItem.style.display = "inline";
}

function hideOverlay(overlay,item)
{
    $get(overlay + item).style.visibility = "hidden";
}