//Fade in/out Animation 
var TimeToFade = 600.0;

//Show/Hide Tooltip Variables;
var mousex, mousey;
var visible_tooltip = "";
var current_tooltip = "";
var last_show_timeout = "";
var fade_interval = 500; //wait 1 second before beginning to show



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);
}



function show_tooltip( tooltip_id )
{
	if( visible_tooltip != tooltip_id ) 
	{
		if( last_show_timeout )
		{
			clearTimeout(last_show_timeout);
		}
		
		current_tooltip = tooltip_id;		

		last_show_timeout = window.setTimeout( function ()
					{
						if( current_tooltip == tooltip_id && current_tooltip != "" )
						{
							if( visible_tooltip )
							{
								fade( visible_tooltip );

								if( document.getElementById(visible_tooltip) != null )
								{
									document.getElementById(visible_tooltip).style.display = 'none';
								}
								visible_tooltip = "";
							}

							visible_tooltip = current_tooltip;

							if( document.getElementById(visible_tooltip) != null )
							{
								document.getElementById(visible_tooltip).style.display = 'block';
							}

							move_tooltip( visible_tooltip );
							fade( visible_tooltip );
							current_tooltip = "";
						}
					}
		,fade_interval,tooltip_id);

	}
}

function hide_tooltip()
{
	var tooltip_id = visible_tooltip;
	var wait_interval = fade_interval + 100;
	current_tooltip = "";

	if( visible_tooltip )
	{
		window.setTimeout( function ()
					{
						if( visible_tooltip == tooltip_id )
						{
							fade( visible_tooltip );
							move_tooltip_out( visible_tooltip );							
							
							if( document.getElementById(tooltip_id) != null )
							{
								document.getElementById(tooltip_id).style.display = 'none';
							}

							visible_tooltip = "";		
						}
					}
		,wait_interval,tooltip_id);
	}
}



function move_tooltip( tooltip_id )
{
	var left_pos, right_pos;
	var left_offset = -80;
	var top_offset = -5;

	if( tooltip_id != "" )
	{
		var tt_obj = document.getElementById(tooltip_id);
		
		if( tt_obj != null )
		{
			left_pos = (mousex + 20) + left_offset;
			top_pos  = (mousey -  tt_obj.offsetHeight) + top_offset;
			
			tt_obj.style.top	= top_pos + "px";
			tt_obj.style.left	= left_pos + "px";
		}
	}
}

//Move the tooltip out of the visible area
function move_tooltip_out( tooltip_id )
{
	if( tooltip_id != "" )
	{
		var tt_obj = document.getElementById(tooltip_id);
		
		if( tt_obj != null )
		{			
			tt_obj.style.top	= "5000px";
		}
	}
}


function mouse_move(e) 
{
	var theTop = 0;
	var theLeft = 0;
	if( !e )
	{
		e = window.event; 
	}

	if (document.documentElement && document.documentElement.scrollTop)
	{
		theTop = document.documentElement.scrollTop;
	}
	else if (document.body)
	{
		theTop = document.body.scrollTop;
	}

	if (document.documentElement && document.documentElement.scrollLeft)
	{
		theLeft = document.documentElement.scrollLeft;
	}
	else if ( document.body  )
	{
		theLeft = document.body.scrollLeft;
	}


	mousex = e.clientX + theLeft;
	mousey = e.clientY + theTop;
}

//Assign the mousemove function to the onmousemove event
document.onmousemove = mouse_move;