// Navigation

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) {
    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 }
} ();