Faster Page Loads With Image Concatenation

img.icon
{
  background: url('/path/to/concatenated/image.gif') no-repeat;
  height: 16px;
  margin-right: 3px;
  vertical-align: middle;
  width: 16px;
}

img.icon
{
  filter:alpha(opacity=50);
  -moz-opacity: 0.5;
  opacity: 0.5;
}

img.icon:hover
{

 filter:alpha(opacity=100);
 -moz-opacity:1.0;
 opacity:1.0;
}

img.icon-home
{
  background-position: 0px 0px;
}

img.icon-search
{
  background-position: -16px 0px;
}

img.icon-bookmark
{
  background-position: -32px 0px;
}

SOURCE@ BorkWeb