How to create inner shadow in Html with css

.box{
width:300px;
height:300px;
background:#FF9;
padding:10px;
-moz-box-shadow: inset 0 0 15px 10px #888;
-webkit-box-shadow: inset 0 0 15px 10px#888;
box-shadow: inset 0 0 15px 10px #888;
text-align:center;
}
Like as :