// POP-UPS

function popRadar(url) {
 new_window = window.open(url,'radar','top=100,left=250,width=660,height=540,toolbar=no,location=0,directories=no,status=no,menubar=no,scrollbars=no,resizable=0');
 setTimeout("new_window.focus()",500);
}

var tiles_array = new Array("masthead_artists00", "masthead_artists01", "masthead_artists02", "masthead_artists03", "masthead_artists04", "masthead_artists05", "masthead_artists06", "masthead_artists07", "masthead_artists08", "masthead_artists09", "masthead_artists10", "masthead_artists11", "masthead_artists12"); // add additional artists as needed
var tiles_pointer = 0;
var fade_timeout_time = 50;
var wait = 3000;

function inittiles() {
	// fade in/out tiles.
	if(tiles_pointer%tiles_array.length == 0) {
   		tiles_pointer = 0;
		for(i = 1; i < tiles_array.length-1; i++)
		{
//			alert("hiding:  tiles_"+tiles_array[i]);
			setOpacity(document.getElementById("tiles_"+tiles_array[i]), 0);
		}
		
	}

//	alert(tiles_pointer);
	lyrId = "tiles_" + tiles_array[tiles_pointer];
	lyr = document.getElementById(lyrId);
	// setOpacity(lyr, 0);
	lyr.style.visibility = 'visible';
	if(tiles_pointer == 0) {
//		alert("fadeOut: tiles_"+tiles_array[tiles_array.length-1]);
		fadeOut("tiles_"+tiles_array[tiles_array.length-1], 100);
	} else {
//		alert("fadeIn: "+lyrId);
    	fadeIn(lyrId,0);
	}
	
	tiles_pointer++;
	var tim = setTimeout("inittiles()", wait);
}

function fadeIn(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity <= 100) {
      setOpacity(obj, opacity);
      opacity += 10;
      window.setTimeout("fadeIn('"+objId+"',"+opacity+")", fade_timeout_time);
    }
  }
}

function fadeOut(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity >= 0) {
      setOpacity(obj, opacity);
      opacity -= 10;
      window.setTimeout("fadeOut('"+objId+"',"+opacity+")", fade_timeout_time);
    }
  }
}

function setOpacity(obj, opacity) {
  opacity = (opacity == 100)?99.999:opacity;
  
  // IE/Win
  obj.style.filter = "alpha(opacity:"+opacity+")";
  
  // Safari<1.2, Konqueror
  obj.style.KHTMLOpacity = opacity/100;
  
  // Older Mozilla and Firefox
  obj.style.MozOpacity = opacity/100;
  
  // Safari 1.2, newer Firefox and Mozilla, CSS3
  obj.style.opacity = opacity/100;
}

function returnDiv(id) {
	if (document.all) // IE
	{
		var div = document.all(id).style;
	}
	else if (document.layers) // NS4
	{
		var div = document.layers[id];
	}
	else if (document.getElementById) // NS6
	{
		var div = document.getElementById(id).style;
	}
	return div;
}

function showLayer(id) 
{
	var div = returnDiv(id);
	div.visibility = "visible";
}

function hideLayer(id) 
{
        var div = returnDiv(id);
        div.visibility = "hidden";
//		previousLayer = "";
}
   
var tim;
var tim2;
var tim3;
var previousLayer = "";
var open_sub_layer = "";

function mouseOutOfLayer(id)
{
	if(id.indexOf("sub_") >= 0)
	{
//		alert("previousLayer = " + previousLayer);
		func = "hideLayer('"+previousLayer+"')";
		tim = setTimeout(func, 200);
		func = "hideLayer('"+id+"')";
		tim2 = setTimeout(func, 200);
	}
	else
	{
		if(open_sub_layer != "")
		{		
			func = "hideLayer('"+open_sub_layer+"')";
			tim2 = setTimeout(func, 200);
		}
		func = "hideLayer('"+id+"')";
		tim = setTimeout(func, 200);
	}
}
 
function mouseIntoLayer(id)
{
	clearTimeout(tim);
	clearTimeout(tim2);

	if(id.indexOf("sub_") >= 0)
	{  // we're mousing into a sub_layer
		if(open_sub_layer != id && open_sub_layer != "")
			hideLayer(open_sub_layer);
		clearTimeout(tim3);
		showLayer(id);
		showLayer(previousLayer);
		open_sub_layer = id;
	}
	else
	{  // we're just mousing into a regular layer

		if (open_sub_layer != "")
			hideLayer(open_sub_layer);
		if(previousLayer != id && previousLayer != "")
		{
			
			hideLayer(previousLayer);
		}
		showLayer(id);
		previousLayer = id;
	}
}

function returnDiv(id) {
	if (document.all) // IE
	{
		var div = document.all(id).style;
	}
	else if (document.layers) // NS4
	{
		var div = document.layers[id];
	}
	else if (document.getElementById) // NS6
	{
		var div = document.getElementById(id).style;
	}
	return div;
}