var TimeToFade = 800.0;


// DEFAULT: FADE FROM VISIBLE TO NON VISIBLE



function resetfade2(eid) {
  var element = document.getElementById(eid);
  if(element == null) return;
  element.FadeState = 2;
  element.style.opacity = 1;
  element.style.filter = 'alpha(opacity = ' + (100) + ')';  
  element.style.display = 'block';
}

function resetfade(eid) {
    var element = document.getElementById(eid);
    if (element == null) return;
    element.FadeState = -2;
    element.style.opacity = 0;
    element.style.filter = 'alpha(opacity = ' + (0) + ')';
    element.style.display = 'none';
}


function fadeoff2(eid) {
  var element = document.getElementById(eid);
  if(element == null) return;
  if ((element.FadeState == null) || (element.FadeState == 2)) fade2(eid);
}

function fadeon2(eid) {
  var element = document.getElementById(eid);
  if(element == null) return;
  if ((element.FadeState != null) && (element.FadeState == -2)) fade2(eid);
}


function fade2(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("animateFade2(" + new Date().getTime() + ",'" + eid + "')", 33);
  }  
}


function animateFade2(lastTick, eid)
{  
  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;
  
  var element = document.getElementById(eid);
 
  if(element.FadeTimeLeft <= elapsedTicks)
  {
    element.style.display = element.FadeState == 1 ? 'block' : 'none';
    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) + ')';
  element.style.display = element.FadeState == 2 ? 'none' : 'block';
  
  setTimeout("animateFade2(" + curTick + ",'" + eid + "')", 33);
}




// DEFAULT: FADE FROM HIDDEN TO VISIBLE


function fadeon(eid) {
    var element = document.getElementById(eid);
    if (element == null) return;
    if ((element.FadeState == null) || (element.FadeState == -2)) fade(eid);
}


function fadeoff(eid) {
    var element = document.getElementById(eid);
    if (element == null) return;
    if ((element.FadeState != null) && (element.FadeState == 2)) fade(eid);
}


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;
    element.style.display = element.FadeState == 2 ? 'none' : 'block';
    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) {
        if (eid != 'ShoppingCartContent') element.style.display = element.FadeState == 1 ? 'block' : 'none';
        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);
}