Untitled

dabblet.css

body {  background: #333;} 

a {
  display: inline-block;
}

a img{
 position: relative;
 z-index: -1;
}
a img:last-child {  display: none;}
a:active img:first-child {  display: none;}
a:active img:last-child {  display: inline-block;}

dabblet.html

<a href="http://douban.com">  <img src="http://www.jammyfm.com/wordpress/wp-content/themes/pinboard/images/white-logo-3.png">  <img src="http://www.jammyfm.com/wordpress/wp-content/themes/pinboard/images/white-logo-2.png"></a>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split-vertical","fontsize":"80","seethrough":"","prefixfree":"1","page":"css"}