var menu=function(){
  var t=15,z=50,s=6,a;

  function dd(n){this.n=n; this.h=[]; this.c=[]}

  dd.prototype.init=function(p,c){
    a=c; var w=document.getElementById(p), s=w.getElementsByTagName('ul'), l=s.length, i=0;
    for(i;i<l;i++){
      var h=s[i].parentNode; this.h[i]=h; this.c[i]=s[i];
      h.onmouseover=new Function(this.n+'.st('+i+',true)');
      h.onmouseout=new Function(this.n+'.st('+i+')');
    }
  }

  dd.prototype.st=function(x,f){
    var c=this.c[x], h=this.h[x], p=h.getElementsByTagName('a')[0];
    clearInterval(c.t); c.style.overflow='hidden';
    if(f){
      p.className+=' '+a;
      if(!c.mh){c.style.display='block'; c.style.height=''; c.mh=c.offsetHeight; c.style.height=0}
      if(c.mh==c.offsetHeight){c.style.overflow='visible'}
      else{c.style.zIndex=z; z++; c.t=setInterval(function(){sl(c,1)},t)}
    }else{
      p.className=p.className.replace(a,''); c.t=setInterval(function(){sl(c,-1)},t)
    }
  }

  function sl(c,f){
    //c.style.display = f ? 'block' : 'none';
    //c.style.height=c.mh+'px';
    //clearInterval(c.t);
    //return;

    var h=c.offsetHeight;
    if((h<=0&&f!=1)||(h>=c.mh&&f==1)){
      if(f==1){c.style.filter=''; c.style.opacity=1; c.style.overflow='visible'}
      clearInterval(c.t); return
    }
    var d=(f==1)?Math.ceil((c.mh-h)/s):Math.ceil(h/s), o=h/c.mh;
    //c.style.opacity=o; c.style.filter='alpha(opacity='+(o*100)+')';
    c.style.height=h+(d*f)+'px'
  }

  return{dd:dd}
}();