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("header")!=-1){
					y++; d.onmousedown=new Function("slider.process(this)");
				}else if(did.indexOf("content")!=-1){
					array.push(did.replace('-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+'-header');
				c=s+'-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)+')';
			var btn = document.getElementById(c.id.replace('-content','-btn'));
			var tekst = document.getElementById(c.id.replace('-content','-tekst'));
			var con = document.getElementById(c.id.replace('-content','-tlo'));
			if(c.direction!=1){
				tekst.style.fontWeight = 'normal';
				btn.innerHTML = '';
				btn.style.color = '#969696';
				con.style.backgroundImage = '';
			}else if(c.direction==1){
				tekst.style.fontWeight = 'bold';
				btn.innerHTML = '';
				btn.style.color = '#3497dd';
				con.style.backgroundImage = 'url(index_images/powody_tlo.png)';
			}
			if(h<2&&c.direction!=1){
				c.style.display='none';
				clearInterval(c.timer);
			}else if(h>(m-2)&&c.direction==1){
				clearInterval(c.timer)
			}
		}
};}();