var facebook_toggle = 0;
var opacity = 0.0;
var fade_in_interval = 0;
var fade_out_interval = 0;
var facebook_container = 0;

function FacebookFadeIn()
{
  opacity += 0.05;
  if (opacity > 1.0) opacity = 1.0;
  facebook_container.style.opacity = opacity;
  if (opacity == 1.0) clearInterval(fade_in_interval);
}


function FacebookFadeOut()
{
  opacity -= 0.05;
  if (opacity < 0.0) opacity = 0.0;
  facebook_container.style.opacity = opacity;

  if (opacity == 0.0)
  {
    clearInterval(fade_out_interval);
    facebook_container.style.display = "none";
  }
}


function FacebookToggle()
{
  facebook_container = document.getElementById("facebook_container");
  
  if (facebook_toggle == 0)
  {
	facebook_container.style.opacity = 0.0;
	facebook_container.style.display = "block";
	fade_in_interval = setInterval("FacebookFadeIn()", 25);
	facebook_toggle = 1;
  }
  else
  {
	fade_out_interval = setInterval("FacebookFadeOut()", 25);
	facebook_toggle = 0;
  }
}