Change color to select box with jQuery

1. Select a value HTML CSS JavaScript jQuery Dojo MooTools Prototype Backbone.js Ember.js Node.js pre-selected
2. Select a value HTML CSS JavaScript jQuery Dojo MooTools Prototype Backbone.js Ember.js Node.js select disabled
3. Select a value HTML CSS JavaScript jQuery Dojo MooTools Prototype Backbone.js Ember.js Node.js one option disabled
4. Select a value HTML CSS JavaScript jQuery Dojo MooTools Prototype Backbone.js Ember.js Node.js
5. Select a value HTML CSS JavaScript jQuery Dojo MooTools Prototype Backbone.js Ember.js Node.js
6. Select a value HTML CSS JavaScript jQuery Dojo MooTools Prototype Backbone.js Ember.js Node.js

Purpose of this script is to give a visual feedback to <select> boxes with no option selected. It is possible to decide which value is considered default in the script options.