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 = 4;

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

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

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

function addEvent(elm, evType, fn, useCapture)
{
	if (elm.addEventListener)
	{
		elm.addEventListener(evType,fn,useCapture);
		return (true);
	}
	else if ( elm.attachEvent )
	{
		var r = elm.attachEvent('on' + evType, fn);
		return (r);
	}
	else
	{
		elm['on' + evType] = fn;
	}
}

function preloadMedImages()
{
    if (typeof(MedImages) != 'undefined' && MedImages.length > 0)
    {
        var images = new Array();
        for (var i = 0; i < MedImages.length; i++)
        {
            var x = new Image;
            x.src = MedImages[i];
            images[images.length] = x;
        }
    }
}

addEvent(window,'load',preloadMedImages);