function initialise_products_script()
	{
		if (!$('AJAX_CHILD_ELEMENT_APPENDER'))
			return;

		var body = $$('body')[0];
		var back = Builder.node('div', {id: 'products_cart_background', className: 'products_cart_background'});
		var curtain = Builder.node('div', {id: 'products_cart_curtain', className: 'products_cart_curtain'});
		var div = Builder.node('div', {id: 'products_cart_div', className: 'products_cart_div'},
		[
			Builder.node('div', {id: 'products_cart_close_link', className: 'products_cart_content_small'},
			[
				Builder.node('strong', 'X'),
				Builder.node('span', ' close cart')
			]),
			Builder.node('div', {id: 'products_cart_div_content'})
		]);
		//body.appendChild(curtain);
		//body.appendChild(back);
		//body.appendChild(div);
		
		// update, IE bug...
		$('AJAX_CHILD_ELEMENT_APPENDER').appendChild(curtain);
		$('AJAX_CHILD_ELEMENT_APPENDER').appendChild(back);
		$('AJAX_CHILD_ELEMENT_APPENDER').appendChild(div);
		
		$('products_cart_curtain').hide();
		$('products_cart_background').hide();
		$('products_cart_div').hide();
		
		$('products_cart_background').setStyle({
			backgroundImage:"url(http://incorporex.com/admin/modules/products/cart_top_tile.gif)",
			backgroundRepeat:"repeat-x"
		});
		
		$('products_cart_background').observe('click', products_cart_minimise);
		$('products_cart_curtain').observe('click', products_cart_minimise);
		$('products_cart_close_link').observe('click', products_cart_minimise);
	}
	
	function products_cart_minimise()
	{
					
		new Effect.Fade('products_cart_curtain', {duration:0.3});
		new Effect.Fade('products_cart_background', {duration:0.3});
		$('products_cart_div').hide();
	}
	
	function products_cart_maximise()
	{
		if ($('products_cart_background').style.display == "none")
		{
			$('products_cart_curtain').style.position = 'fixed';
			
			new Effect.Appear('products_cart_curtain', {duration:0.3, from:0.0, to:0.90});
			new Effect.Appear('products_cart_background', {duration:0.3, from:0.0, to:0.80});
		}
		if ($('products_cart_div').style.display == "none")
			$('products_cart_div').show();
		
		location.href = '#top_of_page';
	}
	
	function products_cart_add_product(id)
	{
		// process parameters...
		var i=0;
		var allowed = true;
		var params = "";
		while ($(id + '_parameter_' + i))
		{
			var elem = $(id + '_parameter_' + i);
			if (elem.value == "")
			{
				if ($(id + '_parameter_label_' + i))
					show_error_message_box("Please select a value for '"+ $(id + '_parameter_label_' + i).value +"'");
				else
					show_error_message_box("Please ensure all product parameter options have been selected");
				allowed = false;
				break;
			}
			else if ($(id + '_parameter_group_' + i))
			{
				var grp_id = parseInt($(id + '_parameter_group_' + i).value);
				params += "&grp" + grp_id + "=" + elem.value;
			}
			i++;
		}
		
		if (allowed)
		{
			products_cart_maximise();
			products_cart_show_loader();
			new Ajax.Request("http://incorporex.com/admin/modules/products/ajax/add_to_cart.php?id=" + id + "&quantity=1" + params, {method: 'get', onComplete: function()
			{
				products_cart_show_products();
			}});
		}
	}
	
	function products_cart_increase_quantity(id)
	{
		products_cart_maximise();
		products_cart_show_loader();
		new Ajax.Request("http://incorporex.com/admin/modules/products/ajax/increase_quantity.php?id=" + id, {method: 'get', onComplete: function()
		{
			products_cart_show_products();
		}});
	}
	
	function products_cart_decrease_quantity(id)
	{
		products_cart_maximise();
		products_cart_show_loader();
		new Ajax.Request("http://incorporex.com/admin/modules/products/ajax/decrease_quantity.php?id=" + id, {method: 'get', onComplete: function()
		{
			products_cart_show_products();
		}});
	}
	
	function products_cart_show_loader()
	{
		var h = parseInt($$('body')[0].clientHeight);
		if(parseInt($$('body')[0].scrollHeight) > h)
			h = parseInt($$('body')[0].scrollHeight);
		h -= parseInt($('products_cart_div_content').offsetTop);
		h -= 10;
		//$('products_cart_div').setStyle({height: h + 'px'});
		
		var HTML = "";
		HTML += "<div align=left style='font-family:Arial; font-size:11px; margin-top:10px; margin-bottom:20px'>";
		HTML += "<img src='http://incorporex.com/admin/modules/products/cart_white.gif' alt='cart' align='absmiddle' />&nbsp;&nbsp;<span style='font-size:14px'><b>Your Cart</b></span><br />";
		HTML += "<div style='margin-top:45px'>Loading...</div>";
		HTML += "</div>";
		
		$('products_cart_div_content').innerHTML = HTML;
	}
	
	function products_cart_show_products()
	{
		setTimeout(function()
		{
			new Ajax.Updater('products_cart_div_content', 'http://incorporex.com/admin/modules/products/ajax/get_cart_info.php', {method: 'get', evalScripts:true, onComplete: function()
			{
				//$('products_cart_div').setStyle({height: 'auto'});
				//var h = parseInt($$('body')[0].clientHeight);
				//if(parseInt($$('body')[0].scrollHeight) > h)
				//	h = parseInt($$('body')[0].scrollHeight);
				//$('products_cart_background').setStyle({height: h});
			}});
		}, 500);
	}
	
	function products_cart_show_your_cart()
	{
		products_cart_maximise();
		products_cart_show_loader();
		products_cart_show_products();
	}
	
	function products_cart_remove_item(item_id)
	{
		products_cart_show_loader();
		new Ajax.Request('http://incorporex.com/admin/modules/products/ajax/remove_item.php', {method:'get', parameters:{id:item_id}, onComplete:function()
		{
			products_cart_show_products();
		}});
	}
	
	function product_frontend_switch_thumbnail(id, image_id)
	{
		jQuery('#td_product_main_thumbnail').fadeTo(350, 0, function()
		{
			jQuery(this)
				.html('Loading...')
				.fadeTo(350, 1, function()
				{
					var img = new Image();
					img.onLoad = product_frontend_switch_thumbnail_ajax(id, image_id);
					img.src = 'http://incorporex.com/admin/modules/products/get_product_thumbnail.php?id='+ id +'&image_id='+ image_id;
				});
		});
	}

	function product_frontend_switch_thumbnail_ajax(id, image_id)
	{
		jQuery('#td_product_main_thumbnail').fadeTo(350, 0, function()
		{
			jQuery(this).load('./admin/modules/products/ajax/get_product_main_thumbnail.php?id='+id+'&image_id='+image_id, function()
			{
				jQuery(this).fadeTo(350, 1);
			});
		});
	}
	
	function products_calculate_has_stock(id, select_element)
	{
		// process parameters...
		var i=0;
		var allowed = true;
		var params = "";
		while ($(id + '_parameter_' + i))
		{
			var elem = $(id + '_parameter_' + i);
			if ($(id + '_parameter_group_' + i))
			{
				if (elem == select_element)
					products_load_parameter_colour(i, elem.value);
				
				var grp_id = parseInt($(id + '_parameter_group_' + i).value);
				params += "&grp" + grp_id + "=" + elem.value;
			}
			i++;
		}
		
		jQuery('#div_product_in_stock').html('Calculating stock...');
		jQuery('#product_addtocart_button_' + id).fadeOut(200);
		new Ajax.Updater('div_product_in_stock', 'http://incorporex.com/admin/modules/products/ajax/has_stock.php?id=' + id + params, {method: 'get', onComplete:function()
		{
			var result = $('div_product_in_stock').innerHTML;
			if (result.toLowerCase().indexOf('green') >= 0)
				jQuery('#product_addtocart_button_' + id).fadeIn(200);
			//else
				//$('product_addtocart_button_' + id).style.visibility = 'hidden';
		}});
	}
	
	function products_load_parameter_colour(counter, option)
	{
		var span = jQuery('#div_colour_preview_'+counter);
		span.fadeOut(350, function()
		{
			jQuery(this)
				.html('loading...')
				.fadeIn(350, function()
				{
					jQuery.get('./admin/modules/products/ajax/get_option_colour.php?number='+ option, '', function(response)
					{
						span.fadeOut(350, function()
						{
							jQuery(this)
								.html(response)
								.fadeIn(350);
						});
					});
				});
		});
	}
	
	document.observe('dom:loaded', initialise_products_script);