var a_photo1 = new Array();
var a_url1 = new Array();
var a_photo2 = new Array();
var a_url2 = new Array();
var a_photo3 = new Array();
var a_url3 = new Array();

m = 0;
j = 0;
k = 0;
 
var photo1_state = 0;
var photo2_state = 0;
var photo3_state = 0;

var photo1_intervalx = 7000;
var photo2_intervalx = 7000;
var photo3_intervalx = 7000;

var photo_silent = 400;
 
var photo1_intid;
var photo2_intid;
var photo3_intid;
 
function show_photo1(){
	//alert('m='+m+' a_url'+a_url1[m]);
	if (photo1_state==0) {
		m++;
		m = m%a_photo1.length;
	}
	
	var o_photo = document.getElementById("photo1");
	if(o_photo) {
		imgfade('photo1', a_photo1[m], 'url1', a_url1[m]);
	}
 
	if (photo1_state==1)	{ photo1_interval = photo1_intervalx; photo1_state = 0; } 
	else								{ photo1_interval = photo_silent; photo1_state = 1; }
 
	clearInterval(photo1_intid);
	photo1_intid = setInterval("show_photo1()", photo1_interval);
 
}

function show_photo2(){
	if (photo2_state==0) {
		j++;
		j = j%a_photo2.length;
	}
	
	var o_photo = document.getElementById("photo2");
	if(o_photo) {
		imgfade('photo2', a_photo2[j], 'url2', a_url2[j]);
	}
 
	if (photo2_state==1)	{ photo2_interval = photo2_intervalx; photo2_state = 0; } 
	else								{ photo2_interval = photo_silent; photo2_state = 1; }
 
	clearInterval(photo2_intid);
	photo2_intid = setInterval("show_photo2()", photo2_interval);
 
}

function show_photo3(){
	if (photo3_state==0) {
		k++;
		k = k%a_photo3.length;
	}
	
	var o_photo = document.getElementById("photo3");
	if(o_photo) {
		imgfade('photo3', a_photo3[k], 'url3', a_url3[k]);
	}
 
	if (photo3_state==1)	{ photo3_interval = photo3_intervalx; photo3_state = 0; } 
	else								{ photo3_interval = photo_silent; photo3_state = 1; }
 
	clearInterval(photo3_intid);
	photo3_intid = setInterval("show_photo3()", photo3_interval);
 
}

function activate_photo() {
 
	photo1_intid = setInterval("show_photo1()",photo1_intervalx);
	photo2_intid = setInterval("show_photo2()",photo2_intervalx);
	photo3_intid = setInterval("show_photo3()",photo3_intervalx);
	
}
 
 
var TimeToFade = 200.0;
 
function imgfade(eid, imgsrc, uid, hrefsrc)
{
 
  var element = document.getElementById(eid);

  if(element == null)
    return;
   
  if(element.FadeState == null)
  {
    if(element.style.opacity == null
        || element.style.opacity == ''
        || element.style.opacity == '1')
    {
      element.FadeState = 2;
    }
    else
    {
      element.FadeState = -2;
    }
  }
   
  if(element.FadeState == 1 || element.FadeState == -1)
  {
    element.FadeState = element.FadeState == 1 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade - element.FadeTimeLeft;
  }
  else
  {
    element.FadeState = element.FadeState == 2 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade;
    setTimeout("animateFade(" + new Date().getTime()
        + ",'" + eid + "', '"+imgsrc+"','"+uid+"','"+hrefsrc+"')", 33);
//    setTimeout("animateFade(" + new Date().getTime()
//        + ",'" + eid + "', '"+imgsrc+"')", 33);

  } 
}
 
function animateFade(lastTick, eid, imgsrc, uid, hrefsrc)
{ 

  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;
 
  var element = document.getElementById(eid);
  var url_element = document.getElementById(uid);
 
  if(element.FadeTimeLeft <= elapsedTicks)
  {
    element.style.opacity = element.FadeState == 1 ? '1' : '0';
    element.style.filter = 'alpha(opacity = '
        + (element.FadeState == 1 ? '100' : '0') + ')';
    element.FadeState = element.FadeState == 1 ? 2 : -2;
	//alert('state='+element.FadeState);
	if (element.FadeState==-2) {
		//alert('state='+element.FadeState);
		element.src = imgsrc;
		url_element.href = hrefsrc;
		//alert('url='+hrefsrc);
	}
    return;
  }
 
  element.FadeTimeLeft -= elapsedTicks;
  var newOpVal = element.FadeTimeLeft/TimeToFade;
  if(element.FadeState == 1)
    newOpVal = 1 - newOpVal;
 
  element.style.opacity = newOpVal;
  element.style.filter =
      'alpha(opacity = ' + (newOpVal*100) + ')';
 
    setTimeout("animateFade(" + curTick
        + ",'" + eid + "', '"+imgsrc+"','"+uid+"','"+hrefsrc+"')", 33);

//  setTimeout("animateFade(" + curTick
//      + ",'" + eid + "', '"+imgsrc+"')", 33);
}