// THIS SCRIPT HANDLES ALL ROLLOVERS ON THE SITE.
// THIS DOES NOT NEED TO BE MODIFIED WHEN MAKING UPDATES TO THE SITE.

function Entry() {
	this.date = "";
	this.photos = new Array();
}

function RolloverEngine(pat)
{	if(pat && pat != null)
		this.pattern = (typeof pat == "string") ? new RegExp(pat) : pat;
	else this.pattern = null;	
	
	RolloverEngine.images = new ImageCollection();
	this.ready = false;
	this.findImages();
	this.ready = true;
					
	return this;
}

RolloverEngine.prototype.findImages = function(doc)
{	if(!doc) doc = window.document;
	
	if(doc.images.length > 0)
	{	var img, a, b;
		for(a = 0; a < doc.images.length; a++)
		{	img = doc.images[a];
			if(img.name){
				if(this.pattern == null || this.pattern.test(img.name))
					this.loadImage(img);
			}
		}
	}
	if(doc.layers && doc.layers != null)
	{	if(doc.layers.length > 0)
		{	for(b = 0; b < doc.layers.length; b++)
			{	this.findImages(doc.layers[b].document);
			}
		}
	}
}

RolloverEngine.prototype.loadImage = function(img){
	if(img && img != null && img.src)
	{	lastSlash = img.src.lastIndexOf("/");
		if(lastSlash == -1) lastSlash = 0;
	
		lastDot = img.src.lastIndexOf(".");
		if(lastDot == -1) lastDot = img.src.length;
		
		imgLoc = (lastSlash > 0) ? img.src.substring(0, lastSlash + 1) : new String("");
		baseName = img.src.substring(lastSlash + 1, lastDot);
		ext = img.src.substring(lastDot, img.src.length);

		// fix for old _off naming
		offIndex = baseName.lastIndexOf("_off");
		if(offIndex != -1) baseName = baseName.substring(0, offIndex);
		
		img.off = new Image();
		img.off.src = img.src;
		img.over = new Image();
		img.over.src = imgLoc + baseName + "_over" + ext;
		img.on = new Image();
		img.on.src = imgLoc + baseName + "_on" + ext;
							
		RolloverEngine.images.addImage(img);
	}
}

RolloverEngine.prototype.containsImage = function(strName)
{	return (strName && strName != null) ? (RolloverEngine.images[strName] && RolloverEngine.images[strName] != null) : false;
}

RolloverEngine.prototype.getImage = function(strName)
{	return (this.containsImage(strName)) ? RolloverEngine.images[strName] : null;
}

RolloverEngine.prototype.setOff = function(strName)
{	img = this.getImage(strName);
	if(img && img != null && this.ready && !img.locked) img.src = img.off.src;
}

RolloverEngine.prototype.setOver = function(strName)
{	img = this.getImage(strName);
	if(img && img != null && this.ready && !img.locked) img.src = img.over.src;
}

RolloverEngine.prototype.setOn = function(strName)
{	img = this.getImage(strName);
	if(img && img != null && this.ready && !img.locked) img.src = img.on.src;
}

RolloverEngine.prototype.setAllOff = function()
{	if(this.ready)
	{	for(a = 0; a < RolloverEngine.images.countImages(); a++)
		{	img = RolloverEngine.images.imageAt(a);
			if(!img.locked) img.src = img.off.src;
		}
	}
}

RolloverEngine.prototype.isOff = function(strName)
{	img = RolloverEngine.images[strName];
	return (img && img != null && img.src == img.off.src);
}

RolloverEngine.prototype.isOver = function(strName)
{	img = RolloverEngine.images[strName];
	return (img && img != null && img.src == img.over.src);
}

RolloverEngine.prototype.isOn = function(strName)
{	img = RolloverEngine.images[strName];
	return (img && img != null && img.src == img.on.src);
}

RolloverEngine.prototype.lock = function(strName)
{	img = RolloverEngine.images[strName];
	if(img && img != null) img.locked = true;
}

RolloverEngine.prototype.lockAll = function()
{	for(i = 0; i < RolloverEngine.images.countImages(); i++)
	{	RolloverEngine.images.imageAt(i).locked = true;
	}
}

RolloverEngine.prototype.unlock = function(strName)
{	img = RolloverEngine.images[strName];
	if(img && img != null) img.locked = false;
}

RolloverEngine.prototype.unlockAll = function()
{	for(j = 0; j < RolloverEngine.images.countImages(); j++)
	{	RolloverEngine.images.imageAt(j).locked = false;
	}
}

RolloverEngine.prototype.isLocked = function(strName)
{	img = RolloverEngine.images[strName];
	return (img && img != null && img.locked && img.locked == true);
}

RolloverEngine.prototype.setSrc = function(strName, path)
{		 img = this.getImage(strName);
		 if(img && img != null && this.ready) img.src = path;
}

RolloverEngine.prototype.getSrc = function(strName)
{		 img = this.getImage(strName);
		 return img.src;
}

RolloverEngine.prototype.toString = function()
{	return "[object RolloverEngine]";
}

function ImageCollection() 
{	this.images = new Array();
}

ImageCollection.prototype.addImage = function(img)
{	if(img && img != null && img.name)
	{	this.images[this.images.length++] = img;
		eval("this." + img.name + " = img;");
	}
}

ImageCollection.prototype.imageAt = function(index)
{	return (index >= 0 && index < this.images.length) ? this.images[index] : null;
}

ImageCollection.prototype.countImages = function()
{	return this.images.length;
}

ImageCollection.prototype.toString = function()
{	return "[object ImageCollection]";
}