var currentimage;

function SwapImage(imgname, newimage)
{
    if (newimage)
    {
        currentimage = document.images[imgname].src;
        document.images[imgname].src = newimage;
    }
    else
    {
        document.images[imgname].src = currentimage;
    }
}

var CurrentMainImage = 5;

function SwapMainImage(i)
{
    if (MedImages[i] != "")
    {
        document.images["mainimage"].src = MedImages[i];
        CurrentMainImage = i;
    }
}

function EnlargeImage()
{
    popup("enlarge.html?" + BigImages[CurrentMainImage]);
}

function popup(src) {
  win = window.open(src,"","top=20,left=20,height=300,width=450,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes")
}