jQuery lib to center the div

codeart-centerdiv.js

/**
 *	jQuery Lib - Plugin to center a div on the screen.
 *
 *	@author:	Damjan Krstevski
 *	@team:		codeart
 *	@contact:	damjan@codeart.mk
 *	@tags:		center, responsive, popup, fixed, optin, lightbox

-> Usage

$(document).ready(function(e) {
	// Use $('body').find(selector) for hidden and absolute elements
	$('body').find('#my-div').centerdiv();
});
 **/

(function ( $ ) {
	
	// Plugin definition.
	$.fn.centerdiv = function( options ) {
		
		// Create callback function
		$.fn.codeart_center_func = function() {}
		
		var _codeart_center_div_func = function( div ) {
			
			// Set css to set the element position
			div.css('position', 'fixed');
			div.css('top', ($(window).height() / 2) - (div.outerHeight() / 2));
			div.css('left', ($(window).width() / 2) - (div.outerWidth() / 2));
			
			return div;
		}
		
		// Get instance
		var div_ready_to_be_centered = this;
		
		// Center div on window resize
		_codeart_center_div_func(div_ready_to_be_centered);
		// Append callback function on window resize event
		$(window).on('resize', function() {
			_codeart_center_div_func(div_ready_to_be_centered);
		});
		
		return this;
	};
	
}( jQuery ));