var win = null;
function newWindow(mypage,myname,w,h,features) {
	var winl = (screen.width-w)/2;
	var wint = (screen.height-h)/2;
	if (winl < 0) winl = 0;
	if (wint < 0) wint = 0;
	var settings = 'height=' + h + ',';
	settings += 'width=' + w + ',';
	settings += 'top=' + wint + ',';
	settings += 'left=' + winl + ',';
	settings += features;
	win = window.open(mypage,myname,settings);
	if (win == null) alert(popupmessage);
	else win.window.focus();
}

function changeImage(smallImage){
    var sizeDelimiter = "medium/";
    var smallSizeDelimiter = "small/";
    var largeSizeDelimiter = "large/";
    
    var mainImage = document.getElementById("mainImage");
	var currentImagePath = smallImage.src;
	var mainLytebox = document.getElementById("mainLytebox");
    mainImage.src = currentImagePath.replace(smallSizeDelimiter,sizeDelimiter);
    largeImg = currentImagePath.replace(smallSizeDelimiter,largeSizeDelimiter);
	mainLytebox.href= largeImg;
	mainLytebox_zoom.href= largeImg;
}