jquery plugin

plugin.js

// jQuery plugin

http://learn.jquery.com/plugins/basic-plugin-creation/

(function ( $ ) {
 
    var shade = "#556b2f";
 
    $.fn.greenify = function() {
        this.css( "color", shade );
        return this;
    };
 
}( jQuery ));

$( "a" ).greenify().addClass( "greenified" );

// ------------------------------------------------------

// Если хотим сделать что-то с большим количеством элементов

	$.fn.myNewPlugin = function() {
 
    return this.each(function() {
        // Do something to each element here.
    });
 
	};

// ------------------------------------------------------

// Options

(function ( $ ) {
 
    $.fn.greenify = function( options ) {
 
        // This is the easiest way to have default options.
        var settings = $.extend({
            // These are the defaults.
            color: "#556b2f",
            backgroundColor: "white"
        }, options );
 
        // Greenify the collection based on the settings variable.
        return this.css({
            color: settings.color,
            backgroundColor: settings.backgroundColor
        });
 
    };
 
}( jQuery ));