Wrap groups of matched elements (jQuery)

jquery.wrapgroups.js

(function ($) {
	// From http://forloop.co.uk/blog/wrap-child-elements-in-groups-in-jquery
	// Modified to work much simpler
	$.fn.wrapGroups = function(options) {
		options = $.extend({
			groupSize : false,
			groupCount: false,
			wrapper : '<div>'
		}, options || {});
		var elems = $(this),
			len = pos = 0;
		if (!options.groupSize) {
			options.groupSize = options.groupCount ? Math.ceil(elems.length/options.groupCount) : 1;
		}
		return elems.each(function(i,value) {
			len = len + 1;
			if (len > 0 && (len % options.groupSize === 0) || (i === elems.length - 1)) {
				elems.slice(pos,i + 1).wrapAll(options.wrapper);
				len = 0;
				pos = i + 1;
			}
		});
	};
})(jQuery);