How do I set zoom out limit on the map, it currently lets me zoom out too far to the point that I see multiple world maps:

JS:

var map;



var all_coor = <?php echo json_encode($addresses); ?>;

var dub = <?php echo json_encode($testadd); ?>;



function initialize() {

var MainLatlng = new google.maps.LatLng(-74.337724,-49.69693);



  var mapOptions = {

    zoom: 7,

    center: new google.maps.LatLng(31.386692,-12.700747)

  };

  map = new google.maps.Map(document.getElementById('map-canvas'),

      mapOptions);



 var markerr = new google.maps.Marker({

      position: MainLatlng ,

      map: map,

      title: 'Main',

      animation: google.maps.Animation.DROP

  });



for (var t = 0, llen = dub.length; t < llen; t++) {



    var marker = new google.maps.Marker({

      position: new google.maps.LatLng(dub[t]['lat'], dub[t]['long']),

      map: map,

      title: dub[t]['title']

    });



}



}





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

HTML:

<div id=map-container style=height: 500px;>

<div id=map-canvas style=width: 100%; height: 100%></div>

</div>

1.How can I set a zoom out limit for the map to render properly?