jquery autocomplete (minor problems)

[Destramic]

Hey guys im having 2 minor problems with my script if someone can give me some advise please?

(all 2 problems are commented on the script itself)

 

1.  highlighting string characters when typed.

2. also im trying to add "Hide Suggestions" at the bottom of my menu so people can turn on/off autocomplete

$(document).ready(function()
{	
	function search_autocomplete(selector, tags, default_value)
	{	
		
		$('#' + selector).focus(function() 
		{
			if($('#' + selector).val() == default_value)
			{
				$('#' + selector).val('');
			}
		});
		
		$('#' + selector).blur(function() 
				{
					if($('#' + selector).val() == '')
					{
						$('#' + selector).val(default_value);
					}
				});
		
	    $('#' + selector).autocomplete(
	    {
	    	source: tags,
	    	timeout: 0,
	    	
	    	select: function (a, b) 
	    	{
	    		$(this).val(b.item.value);
	    	    //submit
	    	},
	    	
	    	create: function () 
	    	{
	            $(this).data('ui-autocomplete')._renderItem = function (ul, item) 
	            { 	
	            	// not highlighting when string characters match
	            	var re = new RegExp('^' + this.term);
	            	var t = item.label.replace(re, "<span id='dropdown-item-highlight'>" + "$&" + "</span>");
	            	
	            	
	                return $('<li></li>')
	                .append('<a>' + t + ' in ' + item.type + '</a>')
	                .addClass( 'dropdown-item' )
	                .appendTo(ul);
	                
	            };
	    	}
	    }); 
	    
	    $(this).data('ui-autocomplete')._renderMenu = function (ul, item) 
        { 	
	    	// unable to show "Hide Suggestions at the bottom of the autocomplete menu
    		return $('<ul></ul>')
    		.append('<a>Hide Suggestions</a>')
    		.addClass( 'dropdown-menu' );
        };
	
	}
	
	var availableTags = [{"label" : "XBOX 360", "type":"Electronics"},
	                     {"label":"XBOX One", "type":"Electronics"},
	                     {"label":"Nike", "type":"Clothing & Footwear"}];
	
	search_autocomplete('query', availableTags, 'Search...');
});

thanks