center items inside edge animation

gistfile1.js

// Add the 'center' class to any element you want to center on resize.
// Using this in combination with the scale-background mode will make backgrounds
// work on all sizes, Yay!

var $center_items = $(".center");
var center;

window.resize = function() {
	console.log("resize");
	$center_items.each(function(i,el){
		center = $(window).width() / 2 - $(el).width() / 2;
		console.log($(window).width());
		$(el).css({
			"left":center
		});
	});
}

$(window).resize(window.resize);

ok so i add the class i get that after reading it again.. where do i plug this code in tho?