$(function() {
	var screenwidth = screen.width;
	var screenheight = screen.height;
	
	$('.popupWindow').click(function() {
		var windowWidth = $(this).attr('data-width');
		var windowHeight = $(this).attr('data-height');
		
		var positionX = (screenwidth / 2) - (windowWidth / 2);
		var positionY = (screenheight / 2) - (windowHeight / 2);
		var link = $(this).attr('href');

		window.open(link, 'Window', "width=" + windowWidth + ",height=" + windowHeight + ",top=" + positionY + ",left=" + positionX);
		return false;
	});
});