https://codepen.io/nevan/pen/dmklG#

http://www.ribosomatic.com/articulos/cambiar-de-estilos-css-con-php-y-jquery-style-switcher/



http://codepen.io/anon/pen/YZdWjq



http://stackoverflow.com/questions/19192747/how-to-dynamically-change-themes-after-clicking-a-drop-down-menu-of-themes

http://jsfiddle.net/82AsF/

http://bootstrap-live-customizer.com/