var TimeToFade = 1000.0;

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;
    if((ind = navigator.appVersion.indexOf("MSIE")) > -1 && navigator.userAgent.indexOf("Opera") == -1)
		element.style.top = '-300px';
	else element.style.top = '-500px';
	}
	//alert (newOpVal);
  if (element.FadeState == -1 && newOpVal < 0.1)
  	element.style.top = '-2000px';
  	
  element.style.opacity = newOpVal;
  element.style.filter = 'alpha(opacity = ' + (newOpVal*100) + ')';
  
  setTimeout("animateFade(" + curTick + ",'" + eid + "')", 1);
}

function fade(eid)
{
  var element = document.getElementById(eid);
  if(element == null)
    return;
  /*
   // senza fade
   if (element.style.top =='-2000px' || element.style.top =='')
   	 element.style.top = '-374px';
   else
  	 element.style.top = '-2000px';
  	*/ 
  	 
  
  // con fade 
  if(element.FadeState == null)
  {
    if(element.style.opacity == null
        || element.style.opacity == ''
        || element.style.opacity == '1')
    {
      element.FadeState = -2;
      //element.style.top = '-400px';
    }
    else
    {
      element.FadeState = 2;
      //element.style.top = '-2000px';
    }
  }
   
  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 + "')", 1);
  }
}