var obj = null;

function showwin(fileName, fileNo, w, h) 
{
  var format = "width=" + (w + 45) + "px,height=" + (h + 48) + "px,resizable=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes";
	try
	{
		if (obj && !obj.closed)
			obj.close();
	}
	catch(ex)
	{
		obj = null;
	}
	obj = window.open("Moves.aspx?fileName=" + fileName + "&fileNo=" + fileNo, "", format);
	obj.focus();			
}

function GoStart()
{
  document.getElementById("fileNo").value = document.getElementById("FirstFile").value;
  location.href = doQueryString();
}

function GoEnd()
{
  document.getElementById("fileNo").value = document.getElementById("LastFile").value;
  location.href = doQueryString();
}

function Forward()
{
  document.getElementById("fileNo").value = document.getElementById("NextFile").value;
  location.href = doQueryString();
}

function Back()
{
  document.getElementById("fileNo").value = document.getElementById("PrevFile").value;
  location.href = doQueryString();
}

function doQueryString() 
{
  var s = "Moves.aspx?fileName=" + document.getElementById("fileName").value;
  s += "&fileNo=" + document.getElementById("fileNo").value;
  return s;
}