//masthead css assignmnet
var artistCSS;
var artist_array = new Array("artists_1.css", "artists_2.css", "artists_3.css");
var artist_pointer = Math.floor(Math.random()*(artist_array.length));
artistCSS =  ("<link rel=\"stylesheet\" href=\"/css/" + artist_array[artist_pointer] + "\" type=\"text/css\">");

//toggle 
function toggleClamShell(objectID) {
				 o = document.getElementById(objectID);
				 if (o.style.display =='block') o.style.display='none';
				 else o.style.display='block';
				 return;
}

//begin artist fade

var tiles_array = new Array("artists00", "artists01", "artists02", "artists03", "artists04", "artists05", "artists06", "artists07", "artists08");
// remove random element var tiles_pointer = Math.floor(Math.random()*(tiles_array.length - 1)) + 1;
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_array[i]), 0);
		}
		
	}

//	alert(tiles_pointer);
	lyrId = 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_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 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, 500);
		func = "hideLayer('"+id+"')";
		tim2 = setTimeout(func, 500);
	}
	else
	{
		if(open_sub_layer != "")
		{		
			func = "hideLayer('"+open_sub_layer+"')";
			tim2 = setTimeout(func, 500);
		}
		func = "hideLayer('"+id+"')";
		tim = setTimeout(func, 500);
	}
}
 
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;
}

function openWindow(url,w,h) {
	var options='top=100,left=250,resizable=yes,scrollbars=yes,menubar=no,width='+w+',height='+h;
	window.open(url,'event',options);
}

var layerTopCount;
var currentTopLayer;
var layerMidCount;
var currentMidLayer;
var layerBotCount;
var currentBotLayer;

function countBanners(){
countTopBanners();
countMidBanners();
countBotBanners();
}

function countTopBanners(){
		var i=0;
		var layerExists=true;
		while (layerExists)
		{
		layerToCheck='banner_top_'+i;
		if (document.getElementById(layerToCheck)) 
		  {
		  i++;
		  } else {
		  layerExists=false;
		  }
		}
		layerTopCount=i;
		if (layerTopCount != 0) {
			noTop=Math.random()*layerTopCount;
			noTop=Math.floor(noTop);
	  		firstLayerToShow='banner_top_'+noTop;
			document.getElementById(firstLayerToShow).style.display = "block";
			currentTopLayer =noTop;
			var t=setTimeout("rotateTopBanners()",15000);
		}
}

function rotateTopBanners(){
		layertohide='banner_top_'+currentTopLayer;
		document.getElementById(layertohide).style.display = "none";
		currentTopLayer++;
		if (currentTopLayer==layerTopCount) {
		  currentTopLayer=0;
		}
		var newLayer='banner_top_'+currentTopLayer;
		document.getElementById(newLayer).style.display = "block";
		var t=setTimeout("rotateTopBanners()",15000)
}


function countMidBanners(){
		var i=0;
		var layerExists=true;
		while (layerExists)
		{
		layerToCheck='banner_mid_'+i;
		if (document.getElementById(layerToCheck)) 
		  {
		  i++;
		  } else {
		  layerExists=false;
		  }
		}
		layerMidCount=i;
		if (layerMidCount != 0) {
			noMid=Math.random()*layerMidCount;
			noMid=Math.floor(noMid);
			firstMidLayerToShow='banner_mid_'+noMid;
			document.getElementById(firstMidLayerToShow).style.display = "block";
			currentMidLayer =noMid;
			var t=setTimeout("rotateMidBanners()",15000);
		}
}

function rotateMidBanners(){
		layertohide='banner_mid_'+currentMidLayer;
		document.getElementById(layertohide).style.display = "none";
		currentMidLayer++;
		if (currentMidLayer==layerMidCount) {
		  currentMidLayer=0;
		}
		var newLayer='banner_mid_'+currentMidLayer;
		document.getElementById(newLayer).style.display = "block";
		var t=setTimeout("rotateMidBanners()",15000)
}

function countBotBanners(){
		var i=0;
		var layerExists=true;
		while (layerExists)
		{
		layerToCheck='banner_bot_'+i;
		if (document.getElementById(layerToCheck)) 
		  {
		  i++;
		  } else {
		  layerExists=false;
		  }
		}
		layerBotCount=i;
		if (layerBotCount != 0) {
			noBot=Math.random()*layerBotCount;
			noBot=Math.floor(noBot);
			firstBotLayerToShow='banner_bot_'+noBot;
			document.getElementById(firstBotLayerToShow).style.display = "block";
			currentBotLayer =noBot;
			var t=setTimeout("rotateBotBanners()",15000)
		}
}

function rotateBotBanners(){
		layertohide='banner_bot_'+currentBotLayer;
		document.getElementById(layertohide).style.display = "none";
		currentBotLayer++;
		if (currentBotLayer==layerBotCount) {
		  currentBotLayer=0;
		}
		var newLayer='banner_bot_'+currentBotLayer;
		document.getElementById(newLayer).style.display = "block";
		var t=setTimeout("rotateBotBanners()",15000)
}