codice:
var slider=function(){
 var array=[]; var speed=10; var timer=10;
 return{
  init:function(t,c){
   var s,ds,l,i,y;
   s=document.getElementById(t); ds=s.getElementsByTagName('div'); l=ds.length; i=y=1;
   for(i=0;i<l;i++){
    var d,did; d=ds[i]; did=d.id;
    if(did.indexOf("header")!=-1){
     y++; d.onclick=new Function("slider.process(this)");
    }else if(did.indexOf("content")!=-1){
     array.push(did.replace('-content','')); d.maxh=d.offsetHeight;
     if(c!=y){d.style.height='0px'; d.style.display='none'}
     else{d.style.display='block'}
    } 
   }
  },
  process:function(d){
   var cl,i; cl=array.length; i=0;
   for(i;i<cl;i++){
    var s,h,c,cd;
    s=array[i]; h=document.getElementById(s+'-header');
    c=s+'-content'; cd=document.getElementById(c); clearInterval(cd.timer);
    if(h==d&&cd.style.display=='none'){
     cd.style.display='block'; this.islide(c,1);
    }else if(cd.style.display=='block'){this.islide(c,-1)}
   }
  },
  islide:function(i,d){var c,m; c=document.getElementById(i); m=c.maxh; c.direction=d; c.timer=setInterval("slider.slide('"+i +"')",timer)},
  slide:function(i){
   var c,m,h,dist; c=document.getElementById(i); m=c.maxh; h=c.offsetHeight;
   dist=(c.direction==1)?Math.round((m-h)/speed):Math.round(h/speed);
   if(dist<=1){dist=1}
   c.style.height=h+(dist*c.direction)+'px'; c.style.opacity=h/c.maxh; c.style.filter='alpha(opacity='+(h*100/c.maxh)+')';
   if(h<2&&c.direction!=1){
    c.style.display='none'; clearInterval(c.timer);
   }else if(h>(m-2)&&c.direction==1){clearInterval(c.timer)}
  }
};}();


il classico accordion "scende"...giusto? io vorrei che salisse...ma non ho idea di dover mettere mano...