jQuery.fn.center = function (absolute) {
	return this.each(function () {
		var t = jQuery(this);

		t.css({
			position:	absolute ? 'absolute' : 'fixed', 
			left:		'50%', 
			top:		'50%', 
			zIndex:		'99'
		}).css({
			marginLeft:	'-' + (t.outerWidth() / 2) + 'px', 
			marginTop:	'-' + (t.outerHeight() / 2) + 'px'
		});

		if (absolute) {
			t.css({
				marginTop:	parseInt(t.css('marginTop'), 10) + jQuery(window).scrollTop(), 
				marginLeft:	parseInt(t.css('marginLeft'), 10) + jQuery(window).scrollLeft()
			});
		}
	});
};