$(document).ready(function(){
	Przewijaj();
});

function Przewijaj() 
{
	$('#ZdjeciaLista div ul li').each(function(i){
		$(this).css('top',(i*65)+'px');
	});
	
	$('#ZdjeciaLista #next').bind('click',function(){
	
		if (this.className == 'disabled') return false; else this.className = 'disabled';
		roll_next();
		return false;
	});
	$('#ZdjeciaLista #prev').bind('click',function(){			
		if (this.className == 'disabled') return false; else this.className = 'disabled';
		roll_prev();
		return false;
	});
	
	
	
}
function roll_next()
{
	box_height = parseInt($('#ZdjeciaLista div').css('height'));
	foto_height = parseInt($('#ZdjeciaLista div ul li').css('height'));
	count = $('#ZdjeciaLista div ul li').length+3;
	var top = parseInt($('#ZdjeciaLista div ul').css('top'));
	var newTop = top - box_height;
	if (newTop < -foto_height * count + box_height){
	 newTop = -foto_height * count + box_height-12;
	 $('#ZdjeciaLista #next').addClass('arrowhidden');
	}
	$('#ZdjeciaLista #prev').removeClass('arrowhidden');
	$('#ZdjeciaLista div ul').animate({'top' : newTop+'px'}, 200, 'swing', function(){
		$('#ZdjeciaLista #next').removeClass('disabled');
	});
}
function roll_prev()
{
	box_height = parseInt($('#ZdjeciaLista div').css('height'));
	var top = parseInt($('#ZdjeciaLista div ul').css('top'));
	var newTop = top + box_height;
	if (newTop > 0){
	 newTop = 0;
	 $('#ZdjeciaLista #prev').addClass('arrowhidden');	 
	}
	$('#ZdjeciaLista #next').removeClass('arrowhidden');	
	$('#ZdjeciaLista div ul').animate({'top' : newTop+'px'}, 200, 'swing', function(){
		$('#ZdjeciaLista #prev').removeClass('disabled');
	});
}