function darken_bg() {
    
		var container = $('body');
		var pixelHeight = container.offsetWidth + "px";
        $('black-screen').setStyle({ 'height': pixelHeight, 'background' : '#002D36 none repeat scroll 0 0' });
    
    }
	
	function undarken_bg() {
		
		$('black-screen').setStyle({ 'height': '0%', 'background' : 'none' });
		
	}
	
	function show_recently_viewed(recently_view_item_page) {
	
		new Ajax.Request(recently_view_item_page, {
			method: 'get',
			parameters: {randid: Math.random()},
			onSuccess: function(transport) {
				$('recently_viewed_div').innerHTML = transport.responseText;
			}
		});
	}