var slider=function(){
	var array=[]; var speed=10; var timer=10;
	return{
		init:function(t,c){
			var s,ds,l,i,y;
			s=document.getElementById(t);
			ds=s.getElementsByTagName('div');
			l=ds.length;
			i=y=0;

			for(i=0; i < l; i++)
			{
				var d,did;
				d=ds[i];
				did=d.id;

				if(did.indexOf("slider_button") != -1)
				{
					y++;
					d.onclick = new Function("slider.process(this)");
				}
				else if(did.indexOf("slider_content") != -1)
				{
					array.push(did.replace('-slider_content',''));
					d.maxh=d.offsetHeight;
					
					if(c!=y)
					{
						d.style.height='0px';
						d.style.display='none'
					}
					else
					{
						d.style.display='block'
					}
				}
			}
		},
		process:function(d)
		{
			var cl,i;
			cl = array.length;
			i = 0;

			for(i; i < cl; i++)
			{
				var s,h,c,cd;
				s = array[i];
				h = document.getElementById(s+'-slider_button');
				c = s+'-slider_content';
				cd = document.getElementById(c);
				clearInterval(cd.timer);

				if(h == d && cd.style.display == 'none')
				{
					cd.style.display = 'block';
					this.islide(c,1);
				}
				else if(cd.style.display == 'block')
				{
					this.islide(c,-1)
				}
			}
		},
		islide:function(i,d)
		{
			var c,m;
			c = document.getElementById(i);
			m = c.maxh;
			c.direction = d;
			c.timer = setInterval("slider.slide('"+i +"')",timer)
		},
		slide:function(i)
		{
			var c,m,h,dist;
			c = document.getElementById(i);
			m = c.maxh;
			h = c.offsetHeight;
			dist = (c.direction == 1) ? Math.round((m-h) / speed) : Math.round(h / speed);

			if(dist <= 1)
			{
				dist = 1;
			}
			c.style.height = h + (dist * c.direction) + 'px';
			c.style.opacity = h / c.maxh;
			c.style.filter = 'alpha(opacity = ' + (h * 100 / c.maxh) + ')';

			if(h < 2 && c.direction != 1)
			{
				c.style.display = 'none';
				clearInterval(c.timer);
			}
			else if(h > (m-2) && c.direction == 1)
			{
				clearInterval(c.timer)
			}
		}
	};
}();