Works on Firefox 3.5+, Google Chrome (Chromium) 4+, Safari 4+

img#one {
border: 5px solid #fff;
box-shadow: 0 0 6px #979797;
-moz-box-shadow: 0 0 6px #979797;
-webkit-box-shadow: 0 0 6px #979797;
}

img#two {
border: 5px solid #fff;
box-shadow: 2px 2px 6px #979797;
-moz-box-shadow: 2px 2px 6px #979797;
-webkit-box-shadow: 2px 2px 6px #979797;
}
Works on Firefox 3.5+, Google Chrome (Chromium) 4+, Safari 4+

img#three {
border: 5px solid #fff;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
box-shadow: 0 0 6px #979797;
-moz-box-shadow: 0 0 6px #979797;
-webkit-box-shadow: 0 0 6px #979797;
}