A map js file with issues.

maps.js

for (var i = 0; i < businesses.length; i++) {
        codeAddress(businesses[i].address,i,function(i,point){
            var description = businesses[i].description;

            if(businesses[i].business_type == "Wine"){
                //http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=A|00CC99|000000
                var icon = 'http://google-maps-icons.googlecode.com/files/wineyard.png';
            }else if(businesses[i].business_type == "Golf"){
                var icon = 'http://google-maps-icons.googlecode.com/files/golf.png';
            }else{
                var icon = 'http://google-maps-icons.googlecode.com/files/festival.png';
            }
            
            var marker = new google.maps.Marker({
                position: point,
                map: map,
                //icon: icon,
                zIndex: Math.round(point.lat()*-100000)<<5
            });
            
            google.maps.event.addListener(marker, 'click', function() {
                infowindow.setContent(description); 
                infowindow.open(map,marker);
            });
            
            markers.push(marker);
            side_bar_html += '<a href="javascript:myclick(' + (markers.length-1) + ')">' + businesses[i].name + '<\/a><br />'+description+'<br />';

            //var marker = createMarker(point,businesses[i].name,description,icon);
            var markerCluster = new MarkerClusterer(map, markers);               
    
            // put the assembled side_bar_html contents into the side_bar div
            document.getElementById("side_bar").innerHTML = side_bar_html;
        });//End codeAddress-function
    }//End for-loop
    
    console.log(markers);
    var markerCluster = new MarkerClusterer(map, markers);