function lightOn(a,b,c) {
	// function lightOn(a,b,c) {
	id = "light-" + a;
	lightClass = document.getElementById(id).className
	if (lightClass=="light on") { return; }
	fade(id);
	document.getElementById(id).style.cursor = "pointer";
/*	current = document.getElementById(id);
	current.style.visibility = "visible";
	current.style.cursor = "pointer";*/
	/*if (b) {
		lightOn(b,c);
	}*/
}

function lightOff(a,b,c) {
	id = "light-" + a;
	lightClass = document.getElementById(id).className
	if (lightClass=="light on") { return; }
	fade(id);
/*	current = document.getElementById(id);
	current.style.visibility = "hidden";	
	current.style.cursor = "default";*/
	if (b) {
		lightOff(b,c);
	}
}

var TimeToFade = 200.0;

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);
}