// -----------------------------------------------------------------------------------
	// 
	// This page coded by Scott Upton
	// http://www.uptonic.com | http://www.couloir.org
	//
	// This work is licensed under a Creative Commons License
	// Attribution-ShareAlike 2.0
	// http://creativecommons.org/licenses/by-sa/2.0/
	//
	// Associated API copyright 2002, Travis Beckham (www.squidfingers.com)
	//
	// -----------------------------------------------------------------------------------
	// --- version date: 04/30/05 ------------------------------------------------------
	
	var photoDir = "http://www219.pair.com/swansonr/thames/";
        // was for Max Kiesler (thanks!) http://www.maxkiesler.com/images/doors/"; // Location of photos for gallery
	var borderSize = 6;	 // = 2x CSS border size
	
	// get current photo id from URL
	var thisURL = document.location.href;
	var splitURL = thisURL.split("#");
	var photoId = splitURL[1] - 1;
	
	// if no id in query string then set to 0
	photoId = (!photoId)? 0:photoId;
		
	// Define each photo's name, height, width, and caption
	var photoArray = new Array(
		// Source, Width, Height, Caption

            new Array("busy_lock.jpg", "600", "421", "Bob Tends Lines at a Busy Lock","Busy Lock"),
            new Array("entering_lock.jpg", "600", "395", "Entering a Lock (lower position)","Entering Lock"),
            new Array("in_lock.jpg", "600", "379", "Lock Keepers House (and 'Lady A')","Lock"),
            new Array("locking.jpg", "600", "472", "Bob Tends the Lines in a Lock","Locking"),
            new Array("lock.jpg", "600", "372", "Beautiful Lock Setting","Beautiful Setting"),
            new Array("bob_cranking.jpg", "600", "424", "Bob Cranking (a lot of work!)","Bob Cranking"),
            new Array("sandi2.jpg", "600", "531", "The Best Man for the Job is a Woman!","Sandi Cranking"),
            new Array("dam.jpg", "600", "436", "Dam and Spillway","Dam and Spillway"),
            new Array("lock_and_dam.jpg", "600", "274", "Lock and Dam (notice the warning signs)","Lock and Dam"),
            new Array("spillway.jpg", "600", "431", "Spillway With Glistening Water","Spillway"),
// 10
            new Array("spillway2.jpg", "600", "428", "Another Spillway With Glistening Water","Another Spillway"),
            new Array("watering.jpg", "600", "485", "The Water Tank Needed Regular Filling (yes, it is raining)","Fill Her Up (with water)"),
            new Array("tied_up.jpg", "600", "441", "Tied Up Near a Lock","Tied Up")
 );
        function removeAllChildren(xxx)
        {
            while (xxx.hasChildNodes()) 
            {
                xxx.removeChild(xxx.firstChild);
            }
        }

        function set_head(text)
        {
            var prompt = document.getElementById("subhead");
            removeAllChildren(prompt); // remove all content
            //
            // add back in
            //
            newtext = document.createTextNode(text); // text for subhead
            prompt.appendChild(newtext); // add text to subhead
        }
	
	// Number of photos in this gallery
	var photoNum = photoArray.length;
	
	// Create access to 'Detect' object and a place to put instances of 'HTMLobj'
	API = new Detect();
	
	// CREATE INSTANCES & LOAD
	loadAPI = function(){
		// Instantiate HTMLobj
		API.Container		= new HTMLobj('Container');
		API.Photo			= new HTMLobj('Photo');
		API.PhotoContainer	= new HTMLobj('PhotoContainer');
		API.LinkContainer	= new HTMLobj('LinkContainer');
		API.PrevLink		= new HTMLobj('PrevLink');
		API.NextLink		= new HTMLobj('NextLink');
		API.CaptionBlock	= new HTMLobj('CaptionBlock');
		API.Counter			= new HTMLobj('Counter');
		API.Caption			= new HTMLobj('Caption');
		API.LoadImg			= new HTMLobj('LoadImg');
		
		// Show initial photo
		cyclePhoto(photoId);
	}
	onload = loadAPI;
	
	// Fade in photo when it is loaded from the server
	initFade = function(){
		// Show PhotoContainer again
		API.PhotoContainer.show();
		
		// Be certain the tween is complete before fading, too
		var fade_timer = setInterval('startFade()', 1000);
						
		// Fade photo in when ready and clear listener
		startFade = function(){
			if(API.Container._tweenRunning == false){
				clearInterval(fade_timer);
				
				// Be certain fade is done running before allowing next/previous links to work
				// This avoids rapid fade-in when users click next/previous links in quick succession
				var adv_timer = setInterval('permitNextPrev()', 500);
				
				// Permit next/previous links to function normally when fade is completed
				permitNextPrev = function(){
					if(API.Photo._fadeRunning == false){
						clearInterval(adv_timer);
						
						// Only show links if there is more than one photo in array
						if(photoNum > 1){
							API.LinkContainer.displayShow();
							document.getElementById('NextLink').onclick = nextPhoto;
							document.getElementById('PrevLink').onclick = prevPhoto;
						}
					} else {return;}
				}
				// Swap out loading animation to spare CPU cycles when hidden anyway
//				API.LoadImg.setSrc("http://www.maxkiesler.com/images/slideshow/start.gif");
				API.LoadImg.setSrc("start.gif");
				
				// Show caption again
				API.CaptionBlock.show();
				
				// Fade photo in
				API.Photo.fadeIn(0,15,33);
			} else {return;}
		}
	}
	
	// Prevent next/previous
	falsify = function(){
		return false;
	}
	
	// Go to next photo
	nextPhoto = function(){
		// Go to next photo
		if(photoId == (photoArray.length - 1)){
			photoId = 0;
		} else {photoId++;}
		cyclePhoto(photoId);
	}
	
	// Go to previous photo
	prevPhoto = function(){
		// If at start, go back to end
		if(photoId == 0){
			photoId = photoArray.length - 1;
		} else {photoId--;}
		cyclePhoto(photoId);
	}
	
	// Alter class of elements
	changeElementClass = function(objId,setClass) {
		document.getElementById(objId).className = setClass;
	}
	
	// Function to load subsequent photos in gallery
	cyclePhoto = function(photoId){
				
		// Swap in loading animation
//		API.LoadImg.setSrc("http://www.maxkiesler.com/images/slideshow/loading_ani2.gif");
		//API.LoadImg.setSrc("radar-transparent.gif");
            API.LoadImg.setSrc("snake_transparent.gif");
		//API.LoadImg.setSrc("loading_ani2.gif");
		
		// Hide link container if it is not already hidden
		API.LinkContainer.displayHide();
		
		// Hide photo container and caption temporarily
		API.Photo.hide();
		API.Photo.setOpacity(0);
		API.CaptionBlock.hide();
		
		// Get dimensions of photo
		var wNew = photoArray[photoId][1];
		var hNew = photoArray[photoId][2];
		
		// Start tween on a delay
		var wCur = API.Container.getWidth() - borderSize;
		var hCur = API.Container.getHeight() - borderSize;
		
		// Begin tweening on a short timer
		setTimeout('API.Container.tweenTo(easeInQuad, ['+wCur+', '+hCur+'], ['+wNew+','+hNew+'], 7)',500);
		setTimeout('API.LinkContainer.sizeTo('+wNew+','+hNew+')',500);
		setTimeout('API.PrevLink.sizeTo('+wNew/2+','+hNew+')',500);
		setTimeout('API.NextLink.sizeTo('+wNew/2+','+hNew+')',500);
		setTimeout('API.CaptionBlock.sizeTo('+wNew+',18)',500);
		
		// Get new photo source
		var newPhoto = photoDir + photoArray[photoId][0];
		//alert(newPhoto);
		// Set source, width, and height of new photo
		API.Photo.setSrc(newPhoto);		
		API.Photo.sizeTo(wNew,hNew);
		
		// Set links to new targets based on photoId
		API.NextLink.setHref("#" + (photoId+1));
		API.PrevLink.setHref("#" + (photoId+1));
		API.Counter.setInnerHtml((photoId+1)+" of "+photoNum+" |");
		API.Caption.setInnerHtml(photoArray[photoId][3]);
		
                set_head(photoArray[photoId][4]); // set subhead
		// Event listeners for onload and onclick events
		document.getElementById('Photo').onload = initFade;
		
		// Block next/previous links until permitNextPrev() has fired
		document.getElementById('NextLink').onclick = falsify;
		document.getElementById('PrevLink').onclick = falsify;
	}