/*
	Image Cross Fade Redux
	Version 1.0
	Last revision: 02.15.2006
	steve@slayeroffice.com

	Rewrite of old code found here: http://slayeroffice.com/code/imageCrossFade/index.html
*/

window.addEventListener?window.addEventListener('load',so_init,false):window.attachEvent('onload',so_init);

var d=document, imgs = new Array(), imgs2 = new Array(); 
var current=0, current2=0;

function so_init()
{
	if(!d.getElementById || !d.createElement)return;
	
	css = d.createElement('link');


/************** TU MUSI BYT NASTAVENA SPRAVNA CESTA ********************/

	css.setAttribute('href','css/slideshow.css');
	css.setAttribute('rel','stylesheet');
	css.setAttribute('type','text/css');
	d.getElementsByTagName('head')[0].appendChild(css);

	imgs = d.getElementById('rotator1').getElementsByTagName('img');
	for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
	imgs[0].style.display = 'block';
	imgs[0].xOpacity = .99;
	
	imgs2 = d.getElementById('rotator2').getElementsByTagName('img');
  for(i=1;i<imgs2.length;i++) imgs2[i].xOpacity = 0;
  imgs2[0].style.display = 'block';
  imgs2[0].xOpacity = .99;

	setTimeout(so_xfade2, 3000);	
}


function so_xfade()
{
  cOpacity = imgs[current].xOpacity;
  nIndex = imgs[current+1]?current+1:0;
  nOpacity = imgs[nIndex].xOpacity;

  cOpacity-=.05;
  nOpacity+=.05;

  imgs[nIndex].style.display = 'block';
  imgs[current].xOpacity = cOpacity;
  imgs[nIndex].xOpacity = nOpacity;

  setOpacity(imgs[current]);
  setOpacity(imgs[nIndex]);

  if(cOpacity<=0)
  {
    imgs[current].style.display = 'none';
    current = nIndex;
    setTimeout(so_xfade2,3000);
  }
  else
  {
    setTimeout(so_xfade,50);
  }

  function setOpacity(obj)
  {
    if(obj.xOpacity>.99)
    {
      obj.xOpacity = .99;
      return;
    }

    obj.style.opacity = obj.xOpacity;
    obj.style.MozOpacity = obj.xOpacity;
    obj.style.filter = 'alpha(opacity=' + (obj.xOpacity*100) + ')';
  }
}

function so_xfade2()
{
  cOpacity = imgs2[current2].xOpacity;
  nIndex = imgs2[current2+1]?current2+1:0;
  nOpacity = imgs2[nIndex].xOpacity;

  cOpacity-=.05;
  nOpacity+=.05;

  imgs2[nIndex].style.display = 'block';
  imgs2[current2].xOpacity = cOpacity;
  imgs2[nIndex].xOpacity = nOpacity;

  setOpacity(imgs2[current2]);
  setOpacity(imgs2[nIndex]);

  if(cOpacity<=0)
  {
    imgs2[current2].style.display = 'none';
    current2 = nIndex;
    setTimeout(so_xfade,3000);
  }
  else
  {
    setTimeout(so_xfade2,50);
  }

  function setOpacity(obj)
  {
    if(obj.xOpacity>.99)
    {
      obj.xOpacity = .99;
      return;
    }

    obj.style.opacity = obj.xOpacity;
    obj.style.MozOpacity = obj.xOpacity;
    obj.style.filter = 'alpha(opacity=' + (obj.xOpacity*100) + ')';
  }
}