$( init );

function init(){
  $('#lastweek').hide();
  $('#nextweek').click(function(){
  	var lvalue = parseInt($('#weekholder').css('left'),10);
  	if(lvalue > '-818'){
	  $('#weekholder').animate({ left : "-=273" }, 2000 );
	  $('#lastweek').show();
	}
	else{
		$('#nextweek').hide();
	}  
	  
  });
  
  $('#lastweek').click(function(){
  	var lvalue = parseInt($('#weekholder').css('left'),10);
  	if(lvalue < '0'){
	  $('#weekholder').animate({ left : "+=273"}, 2000 );
	  $('#nextweek').show();
	}
	else{
		$('#lastweek').hide();
	}  
	  
  });
  


}