var IndexWeek = 0;
$(document).ready(function(){
	$("#contentPhoto").css("overflow-x","hidden");
	Start();
});

function goRight()
{  
	if(IndexWeek < 4)
	  go(+1);
	
}

function goLeft()
{
	if(IndexWeek > 0)
	   go(-1);
	
}

function go(dir)
{
	IndexWeek = (dir > 0) ? IndexWeek+1 : IndexWeek-1;
	$("#contentPhoto").animate ({ left: IndexWeek * -158 + "px"}, "normal");
	
	$("#seta_esquerda").css("visibility","visible");
	$("#seta_direita").css("visibility","visible");
    if (IndexWeek <=0)
        $("#seta_esquerda").css("visibility","visible");
    if (IndexWeek >= 4)
        $("#seta_direita").css("visibility","visible");
}

function Start(){
	var now = new Date();
	IndexWeek = 4;
	var move = IndexWeek * -158 + "px";
	$("#contentPhoto").css("left", move);
	$("#seta_esquerda").css("visibility","visible");
	$("#seta_direita").css("visibility","visible");
	if (IndexWeek <=0)
	 $("#seta_esquerda").css("visibility","visible");
    	if (IndexWeek >= 4)
         $("#seta_direita").css("visibility","visible");
}