// artistfade

var tiles_array = new Array("masthead_00", "masthead_01", "masthead_02", "masthead_03", "masthead_04", "masthead_05", "masthead_06"); // add additional artists as needed
var tiles_pointer = 0;
var fade_timeout_time = 50;
var wait = 4000;

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;
}

var tim;
var tim2;

var open_subnav = "";
var open_subnav_opacity = 0; 
function openSubnav(id)
{
//	alert(id);
	clearTimeout(tim);
	clearTimeout(tim2);
	if(open_subnav != "" && open_subnav != id)
	{ // hide open layer
//		alert("open_subnav = " + open_subnav + "; id = " + id);
	    hideSubnav(open_subnav);
	}
	fadeIn2(id, open_subnav_opacity);
	open_subnav = id;
}

function closeSubnav(id)
{
	tim = setTimeout("hideSubnav('"+id+"')", 800);
}

function hideSubnav(id)
{
    obj = document.getElementById(id);
	setOpacity(obj, 0);
	open_subnav_opacity = 0;
	obj.style.visibility="hidden";
	open_subnav = "";
}


function fadeIn2(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
	obj.style.visibility = "visible";
    if (opacity <= 100) {
      setOpacity(obj, opacity);
	  open_subnav_opacity = opacity;
      opacity += 10;
      tim2 = window.setTimeout("fadeIn2('"+objId+"',"+opacity+")", 30);
    }
  }
}

function fadeOut2(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity >= 0) {
      setOpacity(obj, opacity);
      opacity -= 10;
      tim2 = window.setTimeout("fadeOut2('"+objId+"',"+opacity+")", 30);
    }
	else
		obj.style.visibility="hidden";
  }
}
		


//nav drop downs

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 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);
}

function changePage(newLoc) {
   nextPage = newLoc.options[newLoc.selectedIndex].value
   if (nextPage != "") {
      document.location.href = nextPage
   }
}

function initnav(obj) {

	var av = navigator.appVersion.toLowerCase();
	var platform;
	// check platform
	if (av.indexOf("mac") != -1) {
		platform = "mac";
	} else if (av.indexOf("windows") != -1) {
		platform = "win";
	}

	var isIE = (navigator.appName == "Microsoft Internet Explorer");

	if (document.getElementById && document.getElementById(obj)) {
		navRoot = document.getElementById(obj);
		for (i=0; i<navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			// make sure drop downs don't extend past 990
			// 694 comes from supporting a double menu near the end
			if (node.offsetLeft > 725) {
				var adjust = 725-node.offsetLeft;
				for (var j=0; j<node.childNodes.length; j++) {
					if (node.childNodes[j].nodeName.toUpperCase() == 'UL') {
						
						if(node.childNodes[j].className.indexOf("double")!=-1) {
							// double menu
							node.childNodes[j].style.left = adjust+'px';
						}else if(node.offsetLeft>806) {
							// 81 is to compensate for a double
							node.childNodes[j].style.left = adjust+81+'px'
						}
					}
				}
			}
			node.onmouseover = function() {
				if (this.className.indexOf('lo') != -1) {
					if (this.className.indexOf('solid') != -1) {
						this.className = 'hi solid';
					} else {
						this.className = 'hi';
					}
					
					if (isIE) {
						for (e=0; e<hideElements.length; e++) {
							var formElem = document.getElementById(hideElements[e].id);
							if (formElem != null) {
								formElem.style.visibility = 'hidden';
							}
						}
						
					}
				}
			}
			node.onmouseout = function() {
				if (this.className.indexOf('hi') != -1) {
					if (this.className.indexOf('solid') != -1) {
						this.className = 'lo solid';
					} else {
						this.className = 'lo'
					}
					
					if (isIE) {
						for (e=0; e<hideElements.length; e++) {
							var formElem = document.getElementById(hideElements[e].id);
							if (formElem != null) {
								formElem.style.visibility = 'visible';
							}
						}
						
					}
				}
			}
		}
	}
	
	if (navigator.appName == "Microsoft Internet Explorer" && platform != "mac") {
		isIE = true;
		window.attachEvent("onload", findForm);
		//window.onload = findForm;
	}
}
/* end nav */