// JavaScript Document

//-----------------------------------------------------------
//-----------------------------------------------------------
//-----------------------------------------------------------
//private

var m_nImgCurrent;
var m_strImgPrefix;
var m_nDisplayCount;
var m_strTargetFrame;
var m_nFirstThumb;
var m_strURL;
var m_bSsSpeedMin = 500;
var m_nSsInterval = 500;
var m_bSsSpeed = 5000;
var m_bSlideShow = false;
var m_strImgCounter = null;
var m_strSsLink = null;
var pThumbs = new Array();


function setSettings(i_nDisplayCount, i_strImgPrefix, i_strTargetFrame, i_strURL, i_strImgCounter, i_strSsLink)
{
  m_nDisplayCount = i_nDisplayCount;
  m_strImgPrefix = i_strImgPrefix;
  m_strTargetFrame = i_strTargetFrame;
  m_strURL = i_strURL;
  m_strImgCounter = i_strImgCounter;
  m_strSsLink = i_strSsLink;
  setSlideShowLink(false);
  m_nFirstThumb = 0;		
}
//-----------------------------------------------------------

function doShowLoading(i_strImgCounter)
{
  var pCounter = document.getElementById(i_strImgCounter);
  if(pCounter)
    pCounter.innerHTML = "loading..."; 	
}
//-----------------------------------------------------------
function doClearBorders()
{
  for(var i = 0; i < pThumbs.length; i++)
  {
	var pImg = pThumbs[i];
	pImg.border=0;
  }	
}
//-----------------------------------------------------------

function getABSIndex(i_nDispIndex)
{
  return m_nFirstThumb + i_nDispIndex;	
}
//-----------------------------------------------------------

function setSlideShow(i_bRunning)
{
  m_bSlideShow = i_bRunning; 
  setSlideShowLink(m_bSlideShow);
}

//-----------------------------------------------------------
//-----------------------------------------------------------
//-----------------------------------------------------------
//protected

function doDisplayImages()
{ 
  //calculate scrolling
  // alert(m_nFirstThumb);
  // alert(m_nImgCurrent);
   
  if(m_nImgCurrent < m_nFirstThumb || m_nImgCurrent > (m_nFirstThumb + (m_nDisplayCount - 1)))
  {
    if(m_nImgCurrent < m_nFirstThumb)
      m_nFirstThumb = m_nImgCurrent;   
	else
      m_nFirstThumb = m_nImgCurrent - (m_nDisplayCount - 1);   
  }
  
  for(var i = 0; i < m_nDisplayCount; i++)
  {
	var pImg = pThumbs[m_nFirstThumb + i];
	var nTotalPos = pImg.height;
    var pImage = document.images[m_strImgPrefix + i];
	if(pImage != null)
	{
      pImage.src = pImg.src; 
	  pImage.alt = pImg.name;
	  pImage.title = pImg.name;
	  pImage.name = String(nTotalPos);
      pImage.border = pImg.border;
	}
	else
	{
	  alert("Error : Image container name wrong or out of container bounds");
	  return;
	}
  }
 
}
//-----------------------------------------------------------

function setPositionText()
{
  var strText = String(m_nImgCurrent + 1) + " of " + String(pThumbs.length);
  var pCounter = document.getElementById(m_strImgCounter);
  if(pCounter)
    pCounter.innerHTML = strText; 	
}
//-----------------------------------------------------------

function doMarkCurrImg()
{
  doClearBorders();
  var pImg = pThumbs[m_nImgCurrent];
  pImg.border=2;
}
//-----------------------------------------------------------

function setSlideShowLink(i_bStart)
{
  var pLink = document.getElementById(m_strSsLink);
  if(pLink == null) return;
  
  var nSpeed = m_bSsSpeed / 1000;
  if(i_bStart)
    pLink.innerHTML = "Stop Slideshow (" + nSpeed.toFixed(1) + "s)"
  else	
    pLink.innerHTML = "Start Slideshow (" + nSpeed.toFixed(1) + "s)";	
}
//-----------------------------------------------------------
function setFrameURL()
{
  var strTarget = m_strURL + '#' + pThumbs[m_nImgCurrent].lowsrc;
  frames[m_strTargetFrame].location.href = strTarget;
}

//-----------------------------------------------------------
//-----------------------------------------------------------
//-----------------------------------------------------------
//public

function doInitImages(i_nDisplayCount, i_strImgPrefix, i_strTargetFrame, i_strURL, i_strImgCounter, i_strSsLink)
{
  setSettings(i_nDisplayCount, i_strImgPrefix, i_strTargetFrame, i_strURL, i_strImgCounter,              i_strSsLink); 
  setCurrImage(0);
}
//-----------------------------------------------------------

function doInitImagesFromDoc(i_nDisplayCount, i_strImgPrefix, i_strTargetFrame, i_strURL, i_strImgCounter, i_strSsLink)
{
  setSettings(i_nDisplayCount, i_strImgPrefix, i_strTargetFrame, i_strURL, i_strImgCounter,              i_strSsLink);

  for(var i = 0; i < m_nDisplayCount; i++)
  {
    var pImage = document.images[m_strImgPrefix + i];
		if(pImage != null)
		{
			pImg = new Image();
			pImg.src = pImage.src;
			pImg.name = pImage.alt;
			pImg.lowsrc = pImage.name; 
			pImg.height = i; //store index in object (mis-use "height")
			pThumbs.push(pImg);
		}
		else
		{
			alert("Error : Image container name wrong or out of container bounds");
			return;
		}
  }
  setCurrImage(0);
}
//-----------------------------------------------------------
function doAddImage(i_strSource, i_strAlt, i_strTargetURL)
{
  pImg = new Image();
  pImg.src = i_strSource;
  pImg.name = i_strAlt;
  pImg.lowsrc = i_strTargetURL; 
  pImg.height = pThumbs.length -1; //store index in object (mis-use "height")
  pThumbs.push(pImg);
}
//-----------------------------------------------------------

function setCurrImage(i_nIndex)
{
  if(i_nIndex < 0 || i_nIndex > pThumbs.length - 1)
    return;
	
  m_nImgCurrent = i_nIndex;
  setPositionText();
  doMarkCurrImg();
  doDisplayImages();
  setFrameURL();
}

//-----------------------------------------------------------
//-----------------------------------------------------------
//-----------------------------------------------------------

function setToImage(i_nDispCont)
{ 
  setSlideShow(false);
  if(isNaN(i_nDispCont))
    setCurrImage(Number(i_nDispCont.name));	
  else
    setCurrImage(getABSIndex(i_nDispCont));	
}
//-----------------------------------------------------------

function setImgByTextMarker(i_strTextMarker)
{
	if(i_strTextMarker == "" || i_strTextMarker == null)
	  return;

  for(var i = 0; i < pThumbs.length; i++)
  {
	  var pImg = pThumbs[i];
		if(pImg.lowsrc == i_strTextMarker)
		{
	    setCurrImage(i);
			break;
		}
  }	
}
//-----------------------------------------------------------

function setNextImg()
{
  setSlideShow(false);
  if(m_nImgCurrent < pThumbs.length - 1)	
    setCurrImage(++m_nImgCurrent);
}
//-----------------------------------------------------------

function setPrevImg()
{
  setSlideShow(false);
  if(m_nImgCurrent > 0)
    setCurrImage(--m_nImgCurrent);
}
//-----------------------------------------------------------

function setLastImg()
{
  setSlideShow(false);
  setCurrImage(pThumbs.length - 1);
}
//-----------------------------------------------------------

function setFirstImg()
{
  setSlideShow(false);
  setCurrImage(0);
}
//-----------------------------------------------------------
//-----------------------------------------------------------
//Slide Show

function setSsSpeed(i_bFaster)
{
  if(i_bFaster)
  {
	if(m_bSsSpeed > m_bSsSpeedMin)
      m_bSsSpeed -= m_nSsInterval;		  
  }
  else
    m_bSsSpeed += m_nSsInterval;
	
  setSlideShowLink(m_bSlideShow);	
}
//-----------------------------------------------------------

function doSsImage()
{
  if(!m_bSlideShow) return;	
  
  var nImgCurrent = m_nImgCurrent;
  if(nImgCurrent == pThumbs.length -1)
    nImgCurrent = 0;
  else
    nImgCurrent++;
	
  setCurrImage(nImgCurrent);
  setTimeout("doSsImage()", m_bSsSpeed); 
}
//-----------------------------------------------------------

function doSwitchShow()
{
  setSlideShow(!m_bSlideShow);
  if(m_bSlideShow)
   doSsImage();
    //setTimeout("doSsImage()", m_bSsSpeed); 
}