var galleries_array = new Array();

var currentGallery_obj; 

var currentItem_num;

var _preloaded = false;
var images_array = new Array();

var bg_col = '';

function Gallery(description,label)
{
	this.description_str = description;
	this.label_str = (label!=undefined)? label.split(' ').join(' ') : '';
	this.items_array = new Array();
	this.items_num = 0;
	this.addItem = function(src,label)
	{
		var i = new GalleryItem(src,label);
		this.items_array.push(i);
		this.items_num = this.items_array.length;
	}
}

function GalleryItem(src,label)
{
	this.src = redirect + src;
	this.label = (label!=undefined)? label : '';
}


function nextImage()
{
	currentItem_num = (currentItem_num+1)%currentGallery_obj.items_num;
	updateContact(currentItem_num==0);
	showImage(currentGallery_obj.items_array[currentItem_num]);
}

function prevImage()
{
	currentItem_num = (currentItem_num-1+currentGallery_obj.items_num)%currentGallery_obj.items_num;
	updateContact(currentItem_num==0);
	showImage(currentGallery_obj.items_array[currentItem_num]);
}

function setGallery(nr)
{
	
	if (nr>-1) currentGallery_obj = galleries_array[nr];
	currentItem_num = 0;
	
	// chek if alternative color is defined for gallery pages
	if (bg_col.length>0 && nr>-1) 
	{
		document.bgColor = bg_col;
	} else {
		document.bgColor = 'white';
	}
	
	// setup subnavigation
	findObj('pseudoPages').style.display = 'block';
	var links = '';
	// look for mutliple galleries
	if (galleries_array.length>1)
	{
		for (var i=0; i<galleries_array.length; i++)
		{
			if (i==nr)
			{
				links = links + '<li>' + galleries_array[i].label_str + '</li> '
			} else {
				links = links + '<li><a href="JavaScript:showPseudo(' + i + ');" onfocus=\"blur(this);\">' + galleries_array[i].label_str + '</a></li> '
			}
		}
	}
	// look for infoPage
	if (findObj('infoPage'))
	{
		var links = (nr>-1)? links + '<li><a href="JavaScript:showPseudo(-1);" onfocus=\"blur(this);\">INFORMATION</a></li>' : links + '<li>INFORMATION </li>';
	}
	
	// check if there are pseudopages for the subnavigation
	if (links!='')
	{
		findObj('pseudoPages').innerHTML = "<ul>" + links + "</ul>";
		findObj('pseudoPages').style.marginRight = '10em';
	} else {
		findObj('imageController').style.display = 'none';
	}
	
	// show first picture of selected gallery if available
	if (nr>-1 && galleries_array.length>0)
	{
		showImage(currentGallery_obj.items_array[currentItem_num]);
		findObj('imageController').style.display = 'block';
	}
	
	// preload images on first call
	if (!_preloaded)
	{
		for (var i=0; i<galleries_array.length; i++)
		{
			for (var j=0; j<galleries_array[i].items_num; j++)
			{
				images_array.push(new Image());
				images_array[images_array.length-1].src = galleries_array[i].items_array[j].src;
			}
		}
		_preloaded = true;
	}

}

function updateContact(visible_) {
	var contact = findObj('contact');
	if (contact)
	{
		if (visible_)
		{
			contact.style.display = 'block';
		} else {
			contact.style.display = 'none';
		}
	}
}

function showImage(item) {
	findObj('imagePlaceholder').style.display = 'none';
	findObj('imagePlaceholder').src = item.src;
	findObj('imagePlaceholder').onLoad = adjustImageSize(document.getElementById('imagePlaceholder'));
	findObj('imageDescription').innerHTML = currentGallery_obj.description_str.split('###optTitel###').join(item.label);
	findObj('imageControllerCounter').childNodes[0].nodeValue = addZeros(currentItem_num+1) + ' OF ' + addZeros(currentGallery_obj.items_num);
	// document.getElementById('imageControllerCounter').childNodes[0].nodeValue = addZeros(currentItem_num+1) + ' OF ' + addZeros(currentGallery_obj.items_num);
}

function adjustImageSize(o) {
	o.style.display = 'block';
}

function showPseudo(p)
{
	setGallery(p);
	if(p==-1)
	{
		// InfoPage
		findObj('infoPage').style.display = 'block';
		findObj('imageGallery').style.display = 'none';
		findObj('backLink').style.display = 'block';
		findObj('imageController').style.display = 'none';
	} else {
		// ImageGallery
		if(findObj('infoPage')) findObj('infoPage').style.display = 'none';
		findObj('imageGallery').style.display = 'block';
		findObj('backLink').style.display = 'none';
		findObj('imageController').style.display = 'block';
	}
}

function addZeros(s)
{
	s = "00" + s;
	return s.substr(-2,2);
}

// Example: obj = findObj("image1");
function findObj(theObj, theDoc)
{
  var p, i, foundObj;
  
  if(!theDoc) theDoc = document;
  if( (p = theObj.indexOf("?")) > 0 && parent.frames.length)
  {
    theDoc = parent.frames[theObj.substring(p+1)].document;
    theObj = theObj.substring(0,p);
  }
  if(!(foundObj = theDoc[theObj]) && theDoc.all) foundObj = theDoc.all[theObj];
  for (i=0; !foundObj && i < theDoc.forms.length; i++) 
    foundObj = theDoc.forms[i][theObj];
  for(i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) 
    foundObj = findObj(theObj,theDoc.layers[i].document);
  if(!foundObj && document.getElementById) foundObj = document.getElementById(theObj);
  
  return foundObj;
}


// JS function for uncrypting spam-protected emails:
function mail(_var1, _var2) {
    parent.location= "mail" + "to" + ":" + _var2 + "@" + _var1;
}