iframe e rollover su hover

[M0707]

ciao a tutti
ho questo css

• #home_nav {
  position: absolute;
  height: 116px;
  width: 1230px;
  bottom: 895px;
  z-index: 2;
  }
  #home_nav_bm {
  position: absolute;
  height: 65px;
  width: 1230px;
  bottom: 0px;
  background-repeat: no-repeat;
  background-image: url(../XH_static_images/home/bg_home_bm.png);
  z-index: 3;
  }
  ul, li {
  margin: 0px;
  padding: 0px;
  border: 0px;
  outline: 0px;
  vertical-align: baseline;
  background: transparent;
  }
  #nav {
  position: absolute;
  margin-left: 370px;
  height: 96px;
  width: 630px;
  list-style-image: none;
  list-style-position: outside;
  list-style-type: none;
  z-index: 4;
  }
  #nav li {
  float: left;
  z-index: 4;
  }
  #nav a * {
  display: none;
  z-index: 4;
  }
  #nav a, #nav a .hover {
  position: relative;
  height: 96px;
  display: block;
  background-attachment: scroll;
  background-color: transparent;
  background-image: url(../XH_static_images/pb/XH_nav.png);
  background-repeat: no-repeat;
  background-position: 0px 0px;
  z-index: 4;
  }
  #nav a.mission {
  background-position: 0px 0px;
  width: 150px;
  z-index: 4;
  }
  #nav .attivo a.mission {
  background-position: 0 -96px !important;
  }
  #nav a.projects {
  background-position: -150px 0px;
  width: 170px;
  z-index: 4;
  }
  #nav .attivo a.projects {
  background-position: 0 -96px !important;
  }
  #nav a.team {
  background-position: -320px 0px;
  width: 140px;
  z-index: 4;
  }
  #nav .attivo a.team {
  background-position: 0 -96px !important;
  }
  #nav a.contact {
  background-position: -460px 0px;
  width: 170px;
  z-index: 4;
  }
  #nav .attivo a.contact {
  background-position: 0 -96px !important;
  }

Esiste un modo per mantenere su hover il tasto che si clicca con cambio pagina in iframe?
Ciao a tutti e grazie