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

                // Set position to other than 'static' so element shrink-wraps and width/height is calculated properly
                //t.css({position: 'fixed'});

                // Why are there no jQuery.fn.outerWidth/Height:s?
                var w = t.width(),
				h = t.height(),
				lrPadding = parseInt(t.css('paddingLeft'), 10) + parseInt(t.css('paddingRight'), 10),
				lrBorder = parseInt(t.css('borderLeftWidth'), 10) + parseInt(t.css('borderRightWidth'), 10),
				tbPadding = parseInt(t.css('paddingTop'), 10) + parseInt(t.css('paddingBottom'), 10),
				tbBorder = parseInt(t.css('borderTopWidth'), 10) + parseInt(t.css('borderBottomWidth'), 10);

                if (isNaN(lrPadding)) { lrPadding = 0; }
                if (isNaN(lrBorder)) { lrBorder = 0; }
                if (isNaN(tbPadding)) { tbPadding = 0; }
                if (isNaN(tbBorder)) { tbBorder = 0; }

                var leftMargin = (w + lrPadding + lrBorder) / 2;
                var topMargin = (h + tbPadding + tbBorder) / 2;
                t.css({
                	position: 'fixed',
                	left: '50%',
                	top: '50%',
                	marginLeft: '-' + leftMargin + 'px',
                	marginTop: '-' + topMargin + 'px'
                });

                /* Use this code if you care about IE<7, this requires the dimensions plug-in tho
                // Calculate left and top pos values
                var leftPos = (jQuery(window).width() - jQuery(this).outerWidth()) / 2 + jQuery(window).scrollLeft(), 
                        topPos = (jQuery(window).height() - jQuery(this).outerHeight()) / 2 + jQuery(window).scrollTop();

                // Make sure element is not out of bounds
                leftPos = (leftPos < 0) ? 0 : leftPos;
                topPos = (topPos < 0) ? 0 : topPos;

                jQuery(this).css({left: leftPos +'px', top: topPos +'px', zIndex: '1000'});
                */
        });
};