Как выровнять меню по центру? [перемещено]

<div id="oborot"><div id="center"></div></div>

#oborot{width:1000px;}
#center{width:500px; margin: 0 auto;}

/* IceTheme modules */
/***********************************************************************************************/
/* IceMegaMenu */
/***********************************************************************************************/
@media only screen and (min-width: 979px) {
  .nav-collapse.collapse {
    overflow: visible!important;
  }
}
.icemegamenu > ul {
  margin-left: -10px;
  height: 60px!important;
  background: none;
  border-radius: 0;

}
.icemegamenu > ul > li {
  margin-right: 5px;
  /* active */

}
.icemegamenu > ul > li a {
  padding: 0 8px!important;
  height: 60px!important;
}
.icemegamenu > ul > li a span.icemega_title {
  font-family: "caviar_dreamsregular", "Helvetica Neue", Helvetica, Arial, sans-serif;
  text-shadow: none;
  color: #333333;
  padding-top: 5px;
  display: block;
  font-size: 28px;
}
.icemegamenu > ul > li a:hover span.icemega_title {
  color: #3aa6ae;
}
.icemegamenu > ul > li a span.icemega_desc {
  color: #999999;
  padding-top: 2px;
}
.icemegamenu > ul > li.active {
  background: none;
}
.icemegamenu > ul > li.active > a > span.icemega_title {
  color: #3aa6ae !important;
}
/* First level dropdown */
.icemegamenu ul.icesubMenu {
  background: #fff;
  border-radius: 0;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-top: none;
  padding: 0;
  margin: 0;
}
.icemegamenu ul.icesubMenu ul {
  margin: 0;
  padding: 0;
}
.icemegamenu ul.icesubMenu ul li {
  /* active */

}
.icemegamenu ul.icesubMenu ul li a {
  margin: 0 12px;
  padding: 0!important;
  height: auto!important;
  background: none;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.15)!important;
}
.icemegamenu ul.icesubMenu ul li a span.icemega_title {
  font-size: 14px;
  padding: 0;
}
.icemegamenu ul.icesubMenu ul li:last-child > a {
  border-bottom: none!important;
}
.icemegamenu ul.icesubMenu ul li.active {
  background-position: 95% 45%;
}
.icemegamenu ul.icesubMenu ul li.active > a > span.icemega_title {
  color: #319aa2!important;
}
#icemegamenu > li:hover > ul.icesubMenu {
  top: 60px;
}
/* Second level dropdown */
.icemegamenu ul.icesubMenu ul.icesubMenu {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}
ul.icesubMenu ul > li:hover > ul {
  left: 100%;
  margin-left: -30px;
}
/* Module inside dropdown */
.icesubMenu .icemega_cover_module {
  padding: 10px 15px;
  color: #999;
}
.icesubMenu .icemega_cover_module span.iceModuleTile {
  font-family: "caviar_dreamsregular", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 20px;
  color: #666666;
  text-shadow: none;
  display: block;
  margin: 0 0 12px;
}
.icesubMenu .icemega_cover_module a {
  color: #0088cc;
}
.icesubMenu .icemega_cover_module form#login-form .input-small {
  width: 90%;
}
.icesubMenu .icemega_cover_module form#login-form button {
  background: #60c3ca;
  color: #fff;
  border-radius: 0;
  box-shadow: none;
  border: none;
  text-shadow: none;
  -webkit-transition: all 0.2s ease-out;
  -moz-transition: all 0.2s ease-out;
  -o-transition: all 0.2s ease-out;
  transition: all 0.2s ease-out;
}
.icesubMenu .icemega_cover_module form#login-form button:hover {
  background-color: #73cad0;
  color: #fff;
}

.icemegamenu {width:100%;}
.icemegamenu ul {position:relative; left:-50%; float:right; width:auto;}
.icemegamenu li {position:relative; left:50%;}