var menu = function(){
	var t = 1, z = 1, s = 1, 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}
}();