Gracias por tu respuesta, pero no he visto en esa pagina un menu donde al darle a la segunda opcion del menu se pliegue la primera, simpre se quedan desplegadas a no ser que vuelvas a darle a esa misma opcion.
Voy dejar el codigo que tengo a ver si alguien puede decirme si hay alguna manera de hacerlo.
------Pagina "menu.js"-------
var TIMER_SLIDE = null;
var OBJ_SLIDE;
var OBJ_VIEW;
var PIX_SLIDE = 10; //this is the amount of slide/DELAY_SLIDE
var NEW_PIX_VAL;
var DELAY_SLIDE = 30; //this is the time between each call to slide
var DIV_HEIGHT = 22; //value irrelevant
var SUB_MENU_NUM =0;
var RE_INIT_OBJ = null;
var bMenu = document.getElementById("curMenu");
var MainDiv,SubDiv
//DD added code
document.write('<div id="tempcontainer" class="mainDiv" style="visibility: hidden; position: absolute"></div>')
function Init(objDiv)
{
if (TIMER_SLIDE == null)
{
SUB_MENU_NUM = 0;
MainDiv = objDiv.parentNode;
SubDiv = MainDiv.getElementsByTagName("DIV").item(0);
SubDiv.onclick = SetSlide;
OBJ_SLIDE = MainDiv.getElementsByTagName("DIV").item(1)
OBJ_VIEW = OBJ_SLIDE.getElementsByTagName("DIV").item(0);
document.getElementById("tempcontainer").innerHTML =MainDiv.getElementsByTagName("DIV").item(2).inner HTML //DD added code
DIV_HEIGHT=document.getElementById("tempcontainer" ).offsetHeight //DD added code
for (i=0;i<OBJ_VIEW.childNodes.length;i++)
{
if (OBJ_VIEW.childNodes.item(i).tagName == "SPAN")
{
SUB_MENU_NUM ++;
OBJ_VIEW.childNodes.item(i).onmouseover= ChangeStyle;
OBJ_VIEW.childNodes.item(i).onmouseout= ChangeStyle;
}
}
NEW_PIX_VAL = parseInt(MainDiv.getAttribute("state"));
}
}
function SetSlide()
{
if (window.TIMER_SLIDE) clearInterval(TIMER_SLIDE) //DD added code
if (TIMER_SLIDE == null && this.parentNode == MainDiv)
TIMER_SLIDE = setInterval('RunSlide()', DELAY_SLIDE);
else
{
RE_INIT_OBJ = this;
setTimeout('ReInit()', 200);
}
}
function ReInit(obj)
{
Init(RE_INIT_OBJ);
TIMER_SLIDE = setInterval('RunSlide()', DELAY_SLIDE);
RE_INIT_OBJ = null;
}
function RunSlide()
{
if (OBJ_VIEW.getAttribute("state") == 0)
{
NEW_PIX_VAL += PIX_SLIDE;
OBJ_SLIDE.style.height = NEW_PIX_VAL;
if (NEW_PIX_VAL >= DIV_HEIGHT) //DD modified code
{
clearInterval(TIMER_SLIDE);
TIMER_SLIDE = null;
OBJ_VIEW.style.display = 'inline';
OBJ_VIEW.setAttribute("state","1")
MainDiv.setAttribute("state",NEW_PIX_VAL);
}
} else
{
OBJ_VIEW.style.display = 'none';
NEW_PIX_VAL -= PIX_SLIDE;
if(NEW_PIX_VAL > 0)OBJ_SLIDE.style.height = NEW_PIX_VAL;
if (NEW_PIX_VAL <= 0)
{
NEW_PIX_VAL = 0;
OBJ_SLIDE.style.height = NEW_PIX_VAL
clearInterval(TIMER_SLIDE);
TIMER_SLIDE = null;
OBJ_VIEW.setAttribute("state","0")
MainDiv.setAttribute("state",NEW_PIX_VAL);
}
}
}
function ChangeStyle()
{
if (this.className == this.getAttribute("classOut"))
this.className = this.getAttribute("classOver");
else
this.className = this.getAttribute("classOut");
}
----------------------------------------------------
---------Pagina index.html--------------------------
<html>
<head>
<title>Menu</title>
<script language="JavaScript" type="text/javascript" src="menu.js"></script>
<link rel="stylesheet" type="text/css" href="sddm.css" />
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<!--------Start Menu---------->
<div class="mainDiv" state="0">
<div class="topItem" classOut="topItem" classOver="topItemOver" onMouseOver="Init(this);" > Demo Menu 1</div>
<div class="dropMenu" >
<div class="subMenu" state="0">
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://www.dynamicdrive.com">Dynamic Drive</a></span><BR />
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://www.javascriptkit.com">JavaScript Kit</a></span><BR />
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://www.codingforums.com">Coding Forums</a></span><BR />
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://www.builder.com">Builder.com</a></span><BR />
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://www.cssdrive.com">CSS Drive</a></span>
</div>
</div>
</div>
<!--------End Menu---------->
<BR />
<!--------Start Menu---------->
<div class="mainDiv" state="0">
<div class="topItem" classOut="topItem" classOver="topItemOver" onMouseOver="Init(this)" > Demo Menu 2</div>
<div class="dropMenu" >
<div class="subMenu" state="0">
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://www.slashdot.org">Slash Dot</a></span><BR />
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://news.com">News.com</a></span><BR />
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://wired.com">Wired News</a></span>
</div>
</div>
</div>
<!--------End Menu---------->
<BR />
<!--------Start Menu---------->
<div class="mainDiv" state="0">
<div class="topItem" classOut="topItem" classOver="topItemOver" onMouseOver="Init(this)" > Demo Menu 3</div>
<div class="dropMenu" >
<div class="subMenu" state="0">
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://cnn.com">CNN</a></span><BR />
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://msnbc.com">MSNBC</a></span><BR />
<span class="subItem" classOut="subItem" classOver="subItemOver"><a href="http://news.bbc.co.uk">BBC News</a></span>
</div>
</div>
</div>
<!--------End Menu---------->
</body>
</html>
Gracias de nuevo a todos