var current_banner = 1;
var total_banners = 0;
var wait = 5000;
var TimeToFade = 1000.0;

function banner_init()
{

        //stop banner change if mouse over one banner
        elements = document.getElementById('banners').getElementsByTagName('div');
        total_banners = elements.length;
        for (var i = 0; i < elements.length; i++) 
        { 
                elements[i].onmouseover = function () 
                {

                        clearTimeout(wait);
                }
                elements[i].onmouseout = function () 
                {

                        clearTimeout(wait);

                        wait = setTimeout('nextBanner()',bannertime);

                }       
        }
        //set navigation
        elements = document.getElementById('banners').getElementsByTagName('ul')[0].getElementsByTagName('li');
        total_banners = elements.length;
        for (var i = 0; i < elements.length; i++) 
        { 
                elements[i].title = i + 1;
                elements[i].onmouseover = function () 
                {

                        banner(this.title);
                        clearTimeout(wait);
                }
                elements[i].onmouseout = function () 
                {

                        clearTimeout(wait);

                        wait = setTimeout('nextBanner()',bannertime);

                }       
        }
        wait = setTimeout('nextBanner()',bannertime);
} 


function banner(nr)
{
        clearTimeout(wait);
        elements = document.getElementById('banners').getElementsByTagName('div');
        //hide all divs
        for (var i = 0; i < elements.length; i++) 
        { 
                if (nr == (i + 1))
                {
                    //show selected banner
                    elements[i].style.display = "block";
                    //fade(elements[i].id);  
                } else
                {   //hide everything else
                    elements[i].style.display = "none";
                }
        }
        wait = setTimeout('nextBanner()',bannertime);
}


function nextBanner() 
{

        if(current_banner < total_banners) 
        {
                current_banner ++; 
        }

        else
        {       current_banner = 1;
        }

        banner(current_banner);
}

 function AbreAnuncio(IdAnuncio) {
     void window.open(IdAnuncio)
 }




function fade(eid)
{
  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 + "')", 33);
  }  
}


function animateFade(lastTick, eid)
{  
  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;
  
  var element = document.getElementById(eid);
 
  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;
    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 + "')", 33);
}