$(document).ready(function() { 
	$("div.popup").each(function() {;		
		var win_w = $(window).width();
		var win_h = $(window).height();	
		var left = Math.max(0,  (win_w - $(this).outerWidth()) / 2);
		var top =  Math.max(0, (win_h - $(this).outerHeight()) / 2);
		$(this).css('position', 'absolute').css('left',  left + 'px').css('top', top + 'px').fadeIn(300);	
		$("a.popup-close", $(this)).bind('click', $(this), function(event) { event.preventDefault(); var p = event.data; p.hide(); });	
	});
});