I assume that you want to have multiple background images on the same element. This is possible and supported in all recent versions of the browser, although if you want to support IE8 before, you need to use multiple divs.
.box { background-image: url(../img/box.png), url(../img/shadow_1.png); background-position: 0 0, 0 100%; background-repeat: no-repeat, no-repeat; display: block; height: 64px; margin: 90px auto; overflow: hidden; width: 831px; padding-bottom: 31px; }
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