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

	if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) {
		s = 1;
		z = 50;
		t = 1;
	}

	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';
		c.style.margin = '0px';


		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
	}
}();