var photoArr = new Array();
var photoIndex=0;

function Add_Photo(imgName)
{
	var l=photoArr.length;
  photoArr[l]=imgName;
}

function Next_Photo()
{	
	photoIndex+=1;
  if (photoIndex >= photoArr.length)
  	photoIndex=0;
  $("#photoImg").attr("src",photoArr[photoIndex]);
}

function Prev_Photo()
{
	photoIndex-=1;
  if (photoIndex < 0)
  	photoIndex=photoArr.length-1;
  $("#photoImg").attr("src",photoArr[photoIndex]);
}