html, body{
    margin: 0;
    padding:0;
    height: 100%;
}

#slide{
      -webkit-background-size: cover;
      -moz-background-size: cover;
      -o-background-size: cover;
      background-size: cover;
    position:fixed;
    width:100%;
    height:100%;
}
.slide1{
      background: url(http://wallpapers.wallhaven.cc/wallpapers/full/wallhaven-159465.jpg) no-repeat center center fixed; 
 
    }
.slide2{
      background: url(http://wallpapers.wallhaven.cc/wallpapers/full/wallhaven-160434.png) no-repeat center center fixed; 
    }
.slide3{
      background: url(http://wallpapers.wallhaven.cc/wallpapers/full/wallhaven-150988.jpg) no-repeat center center fixed; 
    }
/*slideshow based off Jonathan Snook's tutorial:
http://snook.ca/archives/javascript/simplest-jquery-slideshow */