/* HELPER FUNCTIONS ***********************************************************/

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	}
	else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

function addEvent( obj, type, fn ) {
	if (obj.addEventListener) {
		obj.addEventListener( type, fn, false );
		EventCache.add(obj, type, fn);
	}
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
		EventCache.add(obj, type, fn);
	}
	else {
		obj["on"+type] = obj["e"+type+fn];
	}
}
	
var EventCache = function(){
	var listEvents = [];
	return {
		listEvents : listEvents,
		add : function(node, sEventName, fHandler){
			listEvents.push(arguments);
		},
		flush : function(){
			var i, item;
			for(i = listEvents.length - 1; i >= 0; i = i - 1){
				item = listEvents[i];
				if(item[0].removeEventListener){
					item[0].removeEventListener(item[1], item[2], item[3]);
				};
				if(item[1].substring(0, 2) != "on"){
					item[1] = "on" + item[1];
				};
				if(item[0].detachEvent){
					item[0].detachEvent(item[1], item[2]);
				};
				item[0][item[1]] = null;
			};
		}
	};
}();

function setupGallery()
{
          if (document.getElementById('controls'))
        {
	document.getElementById('controls').style.display = 'block';
	 }
        if (document.getElementById('previous_image'))
        {
	document.getElementById('previous_image').onclick = function()
	{
		var currImg = '';
		
		if (image_count == 0)
		{
			image_count = image_num-1;
		}
		else
		{
			image_count--;
		}
		
	
		currImg = gallery_array[image_count];
	
		
		document.getElementById('gallery_image').src = '/images/galleries/' + currImg + "";
		document.getElementById('photo_num').innerHTML = image_count+1;
	}
	}
	
	if (document.getElementById('next_image'))
	{
	document.getElementById('next_image').onclick = function()
	{
		if (image_count == image_num-1)
		{
			image_count = 0;
		}
		else
		{
			image_count++;
		}
		
		currImg = gallery_array[image_count];
		
		document.getElementById('gallery_image').src = '/images/galleries/' + currImg + "";
		document.getElementById('photo_num').innerHTML = image_count+1;
	}
	}
}

addEvent(window,'load', setupInitValues);
addEvent(window,'load', setupGallery);