function open_enlargement(fileToOpen, fileWidth, fileHeight)  {
	urlToOpen = fileToOpen + ".html"
	positionLeft = ((screen.width / 2) - 175);
	positionTop = ((screen.height / 2) - 250);
	windowFeatures = "top=" + positionTop + ",left=" + positionLeft + ",width=" + fileWidth + ",height=" + fileHeight + ",toolbar=0,scrollbars=0,resizeable=0,status=0,menubar=0";
	window.open(urlToOpen, fileToOpen, windowFeatures);
}