I am looking to add a unique feature to my blog where the background is standard (for example, black color), but when I hover over a random image on the blog, that image will expand and become a full-screen background.
Here is the code snippet I have tried:
{block:ifphotoeffect}<div id="changer"></div>{/block:ifphotoeffect}
#changer { top: 0px;
left: 0px;
height: 100%;
width: 100%;
background: url(http://static.tumblr.com/mqkrxog/PPan52qgn/transparent.png)top left fixed repeat;
background-size: cover;
position: fixed;
z-index: -9999999999;
opacity: 1;
-webkit-transition:all 0.6s;
-moz-transition:all 0.6s;
-ms-transition:all 0.6s;
-o-transition:all 0.6s;
transition:all 0.6s; }
However, the desired effect does not seem to be working as expected.