window.addEvent('domready', function(){
	
	
	var button2 = $('right-arrow');
	var button1 = $('left-arrow');
	var slider = $('scroller');
	var position = 0;
	var elements = $$(".headline");
	 
	 //alert(elements.length);
	 
	
		button1.addEvent('click', function(e){
				new Event(e).stop();
				
				if(elements.length>1){
					if(position == 0){
						slider.tween('margin-left', -700);
						position = 1;
						return;
					}
				}
				if(elements.length>2){
					if(position == 1){
						slider.tween('margin-left', -1400);
						position = 2;
						return;
					}
				}
				if(elements.length>3){
					if(position == 2){
						slider.tween('margin-left', -2100);
						position = 3;
						return;
					}
				}
				if(elements.length>4){
					if(position == 3){
						slider.tween('margin-left', -2800);
						position = 4;
						return;
					}
				}
				if(elements.length>5){
					if(position == 4){
						slider.tween('margin-left', -3500);
						position = 5;
						return;
					}
				}
				if(elements.length>6){
					if(position == 5){
						slider.tween('margin-left', -4200);
						position = 6;
						return;
					}
				}
				if(elements.length>7){
					if(position == 6){
						slider.tween('margin-left', -4900);
						position = 7;
						return;
					}
				}
				if(elements.length>8){
					if(position == 7){
						slider.tween('margin-left', -5600);
						position = 8;
						return;
					}
				}
				if(elements.length>9){
					if(position == 8){
						slider.tween('margin-left', -6300);
						position = 9;
						return;
					}
				}
				
				
			
				
					if(
					   	(position == 9 && elements.length==10) ||
					   	(position == 8 && elements.length==9) ||
					   	(position == 7 && elements.length==8) ||
					   	(position == 6 && elements.length==7) ||
					   	(position == 5 && elements.length==6) || 
					   	(position == 4 && elements.length==5) || 
						(position == 3 && elements.length==4) || 
						(position == 2 && elements.length==3) || 
						(position == 1 && elements.length==2) 
						
						){
							slider.tween('margin-left', 0);
							position = 0;
						return;
					}
				
				
				
		});
		
		
		
		
		
		
		
		
		button2.addEvent('click', function(e){
				new Event(e).stop();
				
				
					
					
					if(position == 0 ){
						slider.tween('margin-left', (-700*(elements.length-1)));
						position = elements.length-1;
						return;
					}
					
					
					if(position == 1 ){
						slider.tween('margin-left', 0);
						position = 0;
						return;
					}
					
					if(position == 2 ){
						slider.tween('margin-left', -700);
						position = 1;
						return;
					}
					
					if(position == 3 ){
						slider.tween('margin-left', -1400);
						position = 2;
						return;
					}
					
					if(position == 4 ){
						slider.tween('margin-left', -2100);
						position = 3;
						return;
					}
					
					
					
					
				
				
		});
		
	
	
	
	
});