function center(object) {
	var width = jQ(object).width();
	var height = jQ(object).height();	
	var containerWidth = jQ(window).width();
	var containerHeight = jQ(window).height();
	
	width = width/2;
	height = height/2;
	containerWidth = containerWidth/2;
	containerHeight = (containerHeight/3)+jQ(window).scrollTop();
	
	var leftOffset = containerWidth - width;
	var topOffset = containerHeight - height;
	if (topOffset < 20) {
		topOffset = 20;
	}
	
	jQ(object).css('left', leftOffset+'px').css('top', topOffset+'px');
}

function popup(data) {
	jQ('#popup').hide();
	jQ('#popupContent').empty().append(data);
	jQ('#popup').show();
	center('#popup');
}