CSS3 - Image border

#my_CSS3_id {
    text-align:center;
    margin:0 auto;
      height:50px;
  border-width:15px;

  -moz-border-image:url(borderi.png) 30 30 round;
  -webkit-border-image:url(borderi.png) 30 30 round;
  width:580px; padding:15px 25px; height:inherit;
}

#my_CSS3_id2 {
    margin:30px auto;
  border-width:15px;
    height:50px;
  -moz-border-image:url(borderi2.png) 30 30 stretch ;
  -webkit-border-image:url(borderi2.png) 30 30 stretch;
  width:580px; padding:15px 25px; height:inherit;
}