var ddCatNavMenu = function()
{
	var t=10,z=50,s=3,a;
	
	function dd(n)
	{
	    this.n=n; 
	    this.h=[]; 
	    this.c=[]
    }
	
    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);		    		    
        }
	}
	
	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+', false)');
		}
	}
		
	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}
}();