var popupWindow;
function popup(index, imageArray) {
if(popupWindow == null || popupWindow.closed ) {
var w = 0, h = 0;
if (document.all) {
w = document.body.clientWidth;
h = document.body.clientHeight;
}
else if (document.layers) {
w = window.innerWidth;
h = window.innerHeight;
}
var popW = 640, popH = 530, numberOfImages = 3, leftPos = (w-popW)/2, topPos = (h-popH)/2;
popupWindow = window.open(
'','','width=' + popW + ',height=' + popH + ',top=' + topPos + ',left=' + leftPos + ',resizable=no,scrollbars=no,toolbar=no,menubar=no,location=no,directories=no,status=yes');
popupWindow.location.visible = false;
popupWindow.document.open();
popupWindow.document.writeln('Screen Shots');
popupWindow.document.writeln('');
popupWindow.document.writeln('');
popupWindow.document.writeln('