//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");
var tiles_pointer = Math.floor(Math.random()*(tiles_array.length - 1)) + 1;
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_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)
	{  
		// alert('we are 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;
}

var openLayer="";

function toggleOneLayer(objectID) {
				 o = document.getElementById(objectID);
				 if (openLayer!=objectID){
				 o.style.display='block';
					 if (openLayer!=''){
					 c = document.getElementById(openLayer);
					 c.style.display='none';
					 }
				 openLayer=objectID;
				 }
				 return;
}

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

/* begin nav */

hideElements = new Array();
// hides selectors when user rolls over horizontal dropdown
function findForm() {
	//alert('this is ie');
	//hideElements = new Array();
	for (var f=0; f<window.document.forms.length; f++) {
		var theForm = window.document.forms[f];
		for (var e=0; e<theForm.elements.length; e++) {
			var theElem = theForm.elements[e];
			if (theElem.type.substr(0,6) == "select") {
				hideElements.push(theElem);
			}
		}
	}
}

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 > 694) {
				var adjust = 694-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>775) {
							// 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 */