<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
.ocultar {display:none;}
.mostrar {display:block;}
.sel {color:#FF0000;}
.nosel {color:#000000;}
</style>
<script type="text/javascript">
var visto_subm = null;
var visto_color = null;
function ver(val) {
objhl = document.getElementById(val);
obj = document.getElementById(val + '_opcion');
obj.className = (obj==visto_subm) ? 'ocultar' : 'mostar';
objhl.className = (objhl==visto_color) ? 'nosel' : 'sel';
if ((visto_subm != null) && (visto_color != null)) {
visto_subm.className = 'ocultar';
visto_color.className = 'nosel';
}
visto_subm = (obj==visto_subm) ? null : obj;
visto_color = (obj==visto_color) ? null : objhl;
}
</script>
</head>
<body>
<div id="menu1" class="nosel" onclick="ver(this.id)" style="z-index:1;">MENU0</div>
<div id="menu1_opcion" class="ocultar" style="z-index:1;">
SubMenu0<br />
SubMenu0<br />
SubMenu0
</div>
<div id="menu2" class="nosel" onclick="ver(this.id)" style="z-index:1;">MENU1</div>
<div id="menu2_opcion" class="ocultar" style="z-index:1;">
SubMenu1<br />
SubMenu1<br />
SubMenu1
</div>
<div id="menu3" class="nosel" onclick="ver(this.id)" style="z-index:1;">MENU2</div>
<div id="menu3_opcion" class="ocultar" style="z-index:1;">
SubMenu2<br />
SubMenu2<br />
SubMenu2
</div>
<div id="menu4" class="nosel" onclick="ver(this.id)" style="z-index:1;">MENU3</div>
<div id="menu4_opcion" class="ocultar" style="z-index:1;">
SubMenu3<br />
SubMenu3<br />
SubMenu3
</div>
</body>
</html>