/*
Interactive Image slideshow with text description
By Christian Carlessi Salvadó (cocolinks@c.net.gt). Keep this notice intact.
Visit http://www.dynamicdrive.com for script
Modified by Peter J Smith October 2002 to include
Autoincrement adding to image/caption array
Incremental image caching
Image transitions for MS IE 
Show captions when sequence is paused  
Hide captions when sequence is playing
Removed Form based navigation buttons
Added href/image based navigation buttons
*/

crossFadeDuration = 3;
duration = 2;
g_fPlayMode = 0;
g_iimg = -1;
g_imax = 0;
g_ImageTable = new Array();
g_forceCaptions = true;

function ChangeImage(fFwd)
{
if (fFwd)
{
g_nextimg=g_imax+1;
if (++g_iimg==g_imax)
g_iimg=0;
g_nextimg=1;
}
else
{
g_nextimg=g_imax-1;
if (g_iimg==0)
g_iimg=g_imax;
g_nextimg=g_imax-1;
g_iimg--;
}
Update();

}

function getobject(obj){
if (document.getElementById)
return document.getElementById(obj)
else if (document.all)
return document.all[obj]
}

function Update(){	

getobject("Ath_FileName").innerHTML = "";		
// Check for MSIE and set up transition
  if (document.all){
document.images._Ath_Slide.style.filter="blendTrans(duration=duration)"
document.images._Ath_Slide.style.filter="blendTrans(duration=crossFadeDuration)"
document.images._Ath_Slide.filters.blendTrans.Apply()   
}
// Preload next image
getobject("PreLoad").src = g_ImageTable[g_nextimg][0]; 
//Load current image
getobject("Ath_Slide").src = g_ImageTable[g_iimg][0]; 

// Check for MSIE and play transition
  if (document.all){
document.images._Ath_Slide.filters.blendTrans.Play()
}
//Display image numbers
getobject("Ath_Img_X").innerHTML = g_iimg + 1;
getobject("Ath_Img_N").innerHTML = g_imax;

//Display caption is sequence is paused
if (!g_fPlayMode)
{
getobject("Ath_FileName").innerHTML = g_ImageTable[g_iimg][1];
}
if (g_forceCaptions)
{
getobject("Ath_FileName").innerHTML = g_ImageTable[g_iimg][1];
}

}

function Play()
{
//Enable/disable next/back buttons
g_fPlayMode = !g_fPlayMode;
if (g_fPlayMode)
{
getobject("btnPrev").src="PrevG.gif"
getobject("btnNext").src="NextG.gif"
getobject("status").innerHTML = "Playing";
Next();
}
else 
{
getobject("btnPrev").src="Prev.gif"
getobject("btnNext").src="Next.gif"
getobject("status").innerHTML = "Paused";
getobject("Ath_FileName").innerHTML = g_ImageTable[g_iimg][1];
}
}
function OnImgLoad()
{
if (g_fPlayMode)
window.setTimeout("Tick()", g_dwTimeOutSec*1000);
}
function Tick() 
{
if (g_fPlayMode)
Next();
}
function Prev()
{
ChangeImage(false);
}
function Next()
{
ChangeImage(true);
}