function ShowBigImage()
{
	var w = 855;
	var h = 610;
    var l = Math.floor((screen.width - w) / 2);
    var t = Math.floor((screen.height - h) / 2);
	
	var pars = "width=" + w + ",height=" + h +
	    ",left=" + l + ",top=" + t + 
	    ",directories=no,location=no,menubar=no,scrollbars=no,resizable=no,status=no,toolbar=no,systemmenu=no";

	var url =  "gfx/" + currPath + "_s" + curr + ".jpg"; 
    var op = window.open(url, "aaa", pars, "");
}

function ShowNextImage()
{
    if (curr < max)
    {
        curr++;
    }
    prev.disabled = (curr == 1);
    next.disabled = (curr == max);
    small.src = "gfx/" + currPath + "_s" + curr + "m.jpg";
}

function ShowPrevImage()
{    
    if (curr > 1)
    {
        curr--;
    }
    prev.disabled = (curr == 1);
    next.disabled = (curr == max);
    small.src = "gfx/" + currPath + "_s" + curr + "m.jpg";
}