Menu desplegable

[User_Kathy]

Código:

/******************************************* estilos del menu CSS


/* Root = Horizontal, Secondary = Vertical */
ul#navmenu-h {
  margin: 0;
  border: 0 none;
  padding: 0;
  width: 875; /*For KHTML*/
  list-style: none;
  height: 24px;
}

ul#navmenu-h li {
  margin: 0;
  border: 0 none;
  padding: 0;
  float: left; /*For Gecko*/
  display: inline;
  list-style: none;
  position: relative;
  height: 24px;
}

ul#navmenu-h ul {
  margin: 0;
  border: 0 none;
  padding: 0;
  width: 160px;
  list-style: none;
  display: none;
  position: absolute;
  top: 24px;
  left: 0;
}

ul#navmenu-h ul:after /*From IE 7 lack of compliance*/{
  clear: both;
  display: block;
  font: 1px/0px serif;
  content: ".";
  height: 0;
  visibility: hidden;
}

ul#navmenu-h ul li {
  width: 160px;
  float: left; /*For IE 7 lack of compliance*/
  display: block !important;
  display: inline; /*For IE*/
}

/* Root Menu */
ul#navmenu-h a {
  border: 1px solid #99CCCC;
  border-right-color: #CCC;
  border-bottom-color: #CCC;
  padding: 0 6px;
  float: none !important; /*For Opera*/
  float: left; /*For IE*/
  display: block;
  background: #336699;
  color: #FFFFFF;
  font: bold 10px/22px Arial;
  text-decoration: none;
  height: auto !important;
  height: 1%; /*For IE*/
}

/* Root Menu Hover Persistence */
ul#navmenu-h a:hover,
ul#navmenu-h li:hover a,
ul#navmenu-h li.iehover a {
  background: #99CCFF;
  color: #FFFFFF;
}

/* 2nd Menu */
ul#navmenu-h li:hover li a,
ul#navmenu-h li.iehover li a {
  float: none;
  background: #336699;
  color: #FFFFFF;
}

/* 2nd Menu Hover Persistence */
ul#navmenu-h li:hover li a:hover,
ul#navmenu-h li:hover li:hover a,
ul#navmenu-h li.iehover li a:hover,
ul#navmenu-h li.iehover li.iehover a {
  background: #99CCFF;
  color: #FFF;
}

/* 3rd Menu */
ul#navmenu-h li:hover li:hover li a,
ul#navmenu-h li.iehover li.iehover li a {
  background: #336699;
  color: #FFFFFF;
}

/* 3rd Menu Hover Persistence */
ul#navmenu-h li:hover li:hover li a:hover,
ul#navmenu-h li:hover li:hover li:hover a,
ul#navmenu-h li.iehover li.iehover li a:hover,
ul#navmenu-h li.iehover li.iehover li.iehover a {
  background: #99CCFF;
  color: #FFFFFF;
}

/* 4th Menu */
ul#navmenu-h li:hover li:hover li:hover li a,
ul#navmenu-h li.iehover li.iehover li.iehover li a {
	background: #336699;
	color: #FFFFFF;
}

/* 4th Menu Hover */
ul#navmenu-h li:hover li:hover li:hover li a:hover,
ul#navmenu-h li.iehover li.iehover li.iehover li a:hover {
  	background: #99CCFF;
  	color: #FFF;
}

ul#navmenu-h ul ul,
ul#navmenu-h ul ul ul {
  display: none;
  position: absolute;
  top: 0;
  left: 160px;
}

/* Do Not Move - Must Come Before display:block for Gecko */
ul#navmenu-h li:hover ul ul,
ul#navmenu-h li:hover ul ul ul,
ul#navmenu-h li.iehover ul ul,
ul#navmenu-h li.iehover ul ul ul {
  display: none;
}

ul#navmenu-h li:hover ul,
ul#navmenu-h ul li:hover ul,
ul#navmenu-h ul ul li:hover ul,
ul#navmenu-h li.iehover ul,
ul#navmenu-h ul li.iehover ul,
ul#navmenu-h ul ul li.iehover ul {
  display: block;
}


body {
margin: 0;
padding: 0px;
background: #FFF;
color: #666;
text-align: center;
}

h1 {
font: bold 16px, Arial;
}

.p {
margin: 15px 0;
font: 11px/1.5em;
	font-family:arial;
}

.a {
color: #900;
text-decoration: underline;

}

a:hover {
background: #900;
color: #FFF;
text-decoration: none;
}

.hr {
margin: 24px 0;
_margin: 0; /*IE Sucks*/
clear: both;
}

#page-container {
margin: 0 auto;
width: 900px;
text-align: left;
}
<!--*************************************php-->
<!--*********************item1***************-->
<div id="page-container" style="background-color:#336699">

<ul id="navmenu-h" >
<? echo $Ocultar[1];?>
<li>
	<a href="#" onclick="xxx.php">Inicio</a>
</li>
<!--*********************item2***************-->
<li>
	<a href="#">Visitas</a>
    <ul>
    	<li>
           <a href="#" onclick="xxx.php">Registrar Nueva</a> 
        </li>
    	<li>
          <a href="#" onclick="xxx.php">Registrar Salida</a> 
        </li>
         <li>
          <a href="#" onclick="xxx.php">Consultas</a> 
        </li>
	 
    </ul>
</li>
</div>

Espero que te sirva de algo a mi me funciona a la perfección =D