function popup(layerID, show, successLayer)
{
    var layer = document.getElementById(layerID);
    
    if(show == true)
    {
        layer.style.display = "block";
    }
    else
    {
        layer.style.display = "none";
    }
    
    
    var successLayer = document.getElementById(successLayer);
    
    if(successLayer != null)
    {
        successLayer.style.display = "none";
    }
    
    
    return false;
}