function hideInfo()
{
var len = window.document.images.length;
if(navigator.appVersion.charAt(0) >= 4)
  {
	for(i=0; i <= (len - 1); ++i)
		{
		if(window.document.images[i].name == "arrow_back")
			window.document.images[i].src = "desk/pict/arrow_back2.gif";
		};
  };
};

function showInfo()
{
	var len = window.document.images.length;
if(navigator.appVersion.charAt(0) >= 4)
  {
	for(i=0; i <= (len - 1); ++i)
	{
		if(window.document.images[i].name == "arrow_back")
			window.document.images[i].src = "desk/pict/arrow_back1.gif";
	};
  };
}