ayudenme , quien tiene este menu o su codigo

[concepto]

function tabUpOver()
{
if(!tabover)
{
tabover=true;
if(nav.isIE)
var tabObj=this;
else if(nav.isNN)
var tabObj=this.tabObj;
menuIni=tabHeight;
menuHeight=tabObj.height;
if(!deslizando && !creando)
{
if(parseInt(eval(tabObj.layer+t))<tabHeight)
{
clearInterval(tabObj.timer);
moveMenuDir="up";
menuToMove=tabObj.layer;
desMenuTimer=setInterval("moveMenu();", timeDes*20);
}
}
}
}

function tabUpOut()
{
tabover=false;
if(nav.isIE)
var tabObj=this;
else if(nav.isNN)
var tabObj=this.tabObj;
clearInterval(desMenuTimer);
}

function tabDownOver()
{
if(!tabover)
{
tabover=true;
if(nav.isIE)
var tabObj=this;
else if(nav.isNN)
var tabObj=this.tabObj;
menuIni=tabHeight;
menuHeight=tabObj.height;
if(!deslizando && !creando)
{
if(parseInt(eval(tabObj.layer+t))+tabObj.height&gt ;(tabHeight+maxHeight))
{
clearInterval(tabObj.timer);
menuToMove=tabObj.layer;
moveMenuDir="down";
desMenuTimer=setInterval("moveMenu();", timeDes*20);
}
}
}
}

function tabDownOut()
{
tabover=false;
if(nav.isIE)
var tabObj=this;
else if(nav.isNN)
var tabObj=this.tabObj;

clearInterval(desMenuTimer);
}

function newHeight(height)
{
this.height=height;
if(this.height>(maxHeight+2*tabHeight))
{
eval(this.tab1+v+"=\""+visible+&quo t;\";");
eval(this.tab2+v+"=\""+visible+&quo t;\";");
desplaza(eval(this.tab1),0,0);
desplaza(eval(this.tab2),0,maxHeight+tabHeight);
if(!this.on)
desplaza(eval(this.layer),0,tabHeight);
this.on=true;
}
else
{
eval(this.tab1+v+"=\""+hidden+&quot ;\";");
eval(this.tab2+v+"=\""+hidden+&quot ;\";");
desplaza(eval(this.tab1),0,-tabHeight);
desplaza(eval(this.layer),0,0);
this.on=false;
}
}

function setMaxHeight()
{
if(nav.isIE)
maxHeight=document.body.clientHeight-tabHeight*2;
else if(nav.isNN)
{
var aux=5;
if(nav.isMac) aux=0;
maxHeight=window.innerHeight-tabHeight*2+aux;
}
}