initial of jquery plugin

jquery.pluginname.js

(function($) {
	$.fn.pluginname = function(options) {
		// build main options before element iteration
		var opts = $.extend({}, $.fn.pluginname.defaults, options);
		opts.debug && debug(this);
		// iterate and reformat each matched element
		return this.each(function() {
			$this = $(this);
		});
	};
	// private function for debugging
	function debug($obj) {
		if (window.console && window.console.log) {
			window.console.log('pluginname selection count: ' + $obj.size());
		}
	};
	// define and expose our format function
	$.fn.pluginname.methodname = function() {
	};
	// plugin defaults
	$.fn.pluginname.defaults = {
		debug: 0
	};
})(jQuery);

via. http://www.learningjquery.com/2007/10/a-plugin-development-pattern