var handlePrevButtonState = function(type, args)
{
 var enabling = args[0];
 var leftImage = args[1];
 if(enabling)
 {
  leftImage.src = "/img/btn_prev.png";
 }
 else
 {
  leftImage.src = "/img/btn_prev.png";
 }
};

var handleNextButtonState = function(type, args)
{
 var enabling = args[0];
 var rightImage = args[1];

 if(enabling)
 {
  rightImage.src = "/img/btn_next.png";
 }
 else
 {
  rightImage.src = "/img/btn_next.png";
 }
};