Google Maps API v3 - Redrop my markers and center

I have an array setup for various objects, however I would like to get it to redrop the icons and center / zoom out to the map based on where the icons are.

I have tried using setMap(null) to clear the markers, but was having issues with the icon reloading. When there is some overlay with the icons it flickers slightly so I was hoping to use the drop method instead; similar to this link https://google-developers.appspot.com/maps/documentation/javascript/examples/marker-animations-iteration

I would like it to redrop all the icons if possible, depending on the category that is visible.
The current code below show and hides the appropriate icons, I just need to working the drop / centering function

	var map;
  function initialize() {
		
        var centerMap = new google.maps.LatLng(44.3019727, -78.3539062);

        var myOptions = {
            zoom:13,
            center: centerMap,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        }

        var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

        setMarkers(map, sites);
	    infowindow = new google.maps.InfoWindow({
                content: "loading…"
            });

      
    }

  var sites = [
    
         	
    	     		['TVM Apartments', '44.278509', '-78.3742282',1,'<h4>TVM Apartments, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-apartments/">More Info</a>', 'two three '],
  	    	  
         	
    	     		['TVM Manor', '44.309494', '-78.325782',1,'<h4>TVM Manor, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-manor/">More Info</a>', 'one two '],
  	    	  
         	
    	     		['TVM Tower Residences', '44.3070732', '-78.3225406',1,'<h4>TVM Tower Residences, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-tower-residences/">More Info</a>', 'one two three '],
  	    	  
         	
    	     		['TVM Peterborough', '44.3071462', '-78.3204109',1,'<h4>TVM Peterborough, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-peterborough/">More Info</a>', 'bachelor one two '],
  	    	  
         	
    	     		['TVM Schoolhouse', '44.3071949', '-78.3280039',1,'<h4>TVM Schoolhouse, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-schoolhouse/">More Info</a>', 'bachelor one two '],
  	    	  
         	
    	     		['TVM Terraces', '44.306868', '-78.328013',1,'<h4>TVM Terraces, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-terraces/">More Info</a>', 'two three '],
  	    	  
         	
    	     		['TVM George St.', '44.308311', '-78.322177',1,'<h4>TVM George St., ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-george-st/">More Info</a>', 'bachelor one two '],
  	    	  
         	
    	     		['TVM Mansions', '44.30653', '-78.328078',1,'<h4>TVM Mansions, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-mansions/">More Info</a>', 'bachelor one two three '],
  	    	  
         	
    	     		['TVM Hunter', '44.3057949', '-78.3221051',1,'<h4>TVM Hunter, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-hunter/">More Info</a>', 'bachelor one two '],
  	    	  
         	
    	     		['TVM Courtyard', '44.278497', '-78.374222',1,'<h4>TVM Courtyard, ON</h4><a href ="http://tvmgroup.onroad.org/residential/tvm-courtyard/">More Info</a>', 'two three '],
  	    	  
         
    ];
	var init = "";
	var gmarkers = [];
     var iterator = 1;

	var image = 'http://tvmgroup.onroad.org/wp-content/themes/tvm/images/mapicon.png';
    function setMarkers(map, markers) {

        for (var i = 0; i < markers.length; i++) {
       // alert(markers.length);
            var sites = markers[i];
            var siteLatLng = new google.maps.LatLng(sites[1], sites[2]);
            var marker = new google.maps.Marker({
                position: siteLatLng,
                map: map,
                icon: 'http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld='+(i+1)+'|000000|ffffff',
                animation: google.maps.Animation.DROP,
                title: sites[0],
                zIndex: sites[3],
                html: sites[4]
            });
            marker.mycategory = sites[5]; 
            gmarkers.push(marker);
            //marker.metadata = {type: "point", id: "1"};

            var contentString = "Some content";

            google.maps.event.addListener(marker, "click", function () {
               // alert(this.html);
                infowindow.setContent(this.html);
                infowindow.open(map, this);
            });
        }
        
    }
 // == shows all markers of a particular category, and ensures the checkbox is checked ==
      function show(category) {
      //	alert(category);
      
        for (var i=0; i<gmarkers.length; i++) {
       // alert(gmarkers[i].mycategory);
       	  if (category.indexOf( "all" ) !== -1) {
       	  	gmarkers[i].setVisible(true);
       	  }
          else if (gmarkers[i].mycategory.indexOf( category ) !== -1) {
            gmarkers[i].setVisible(true);
          } else{
          	gmarkers[i].setVisible(false);
          }
        }
        // == check the checkbox ==
        //document.getElementById(category+"box").checked = true;
      }

      // == hides all markers of a particular category, and ensures the checkbox is cleared ==
      function hide(category) {
        for (var i=0; i<gmarkers.length; i++) {
          if (gmarkers[i].mycategory == category) {
            gmarkers[i].setVisible(false);
          }
        }
        // == clear the checkbox ==
        //document.getElementById(category+"box").checked = false;
        // == close the info window, in case its open on a marker that we just hid
        infowindow.close();
      }

      // == a checkbox has been clicked ==
     

google.maps.event.addDomListener(window, 'load', initialize);


	$(function() {
		
		
$('.bluebox').click(function() {
			$('.bluebox').addClass('off');
			$(this).removeClass('off');
			var cat = $(this).attr("id");
			show(cat);
			
			});

	});

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