input.sticky {
height: 18px;
padding-left: 15px;
background: url(../images/pushpin.png) top left no-repeat;
  filter:alpha(opacity=50);
        -moz-opacity:0.5;
        -khtml-opacity:0.5;
        opacity:0.5;
}

input.sticky:checked {
  background-image: url(../images/pushpin.png);
  filter:alpha(opacity=100);
        -moz-opacity:1;
        -khtml-opacity:1;
        opacity:1;
}