title: you have included the Google Maps API multiple times on this page. This may cause unexpected errors
body: <p>I get two error when using google map:</p>
  
  <ol>
  <li>Warning: you have included the Google Maps API multiple times on this page. This may cause unexpected errors.</li>
  <li>a is null (main.js)</li>
  </ol>
  
  <p>i don't know if there is any connection between the two, but the final result is that my page cannot load the map.</p>
  
  <p>here is my head tag:</p>
  
  <pre><code>&lt;script type="text/javascript" src="../s/Jquery/jquery-1.6.1.min.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="../s/jquery.placeholder.min.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="../s/index.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="../s/Jquery/ui/jquery.ui.core.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="../s/Jquery/ui/jquery.ui.widget.js"&gt;&lt;/script&gt;
  
  &lt;script type="text/javascript" src="../s/Jquery/ui/jquery.ui.position.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="../s/Jquery/ui/jquery.ui.autocomplete.js"&gt;&lt;/script&gt;
  &lt;script src="../dd/markerclusterer_compiled.js" type="text/javascript"&gt;&lt;/script&gt;&lt;script src="../dd/dealers_js.js" type="text/javascript"&gt;&lt;/script&gt;&lt;script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>here is the function which i call the google map:</p>
  
  <pre><code>function set_google_map(set_region)
  {
  
          var zoom;
          var center;
          switch (set_region) {
              case "usa":
                  zoom = 3;
                  center = new google.maps.LatLng(37.09, -95.71);
                  break;
              case "europe":
                  zoom = 3;
                  center = new google.maps.LatLng(48.58, 7.71);
                  break;
              case "east":
                  zoom = 3;
                  center = new google.maps.LatLng(31, 121);
                  break;
              default:
                  zoom = 1;
                  center = new google.maps.LatLng(35, 5);
          }
          // Creating the map  
          map = new google.maps.Map(document.getElementById('map'), options);
          google.maps.event.addListener(map, 'click', function(){
              clean_icons();
              if (infowindow) 
                  infowindow.close();
          });
          map.setCenter(center);
          map.setZoom(zoom);
  
  
              //bounds = new google.maps.LatLngBounds();  
  }
  </code></pre>
  
  <p>these are my variables:</p>
  
  <pre><code>var UseridEncr;
  var super_category="ATE";
  var infowindow;
  var map;
  var bounds;
  var image="../dd/i/green.png";
  var image_active="../dd/i/red.png";
  var mc ;
  var location_changed=true;
  var current_region="usa";
  var mcOptions = {gridSize:30, maxZoom: 8};
  var last_marker;
  var last_marker_z;
  var DealersData ;
  var markers=[];
  var markers_selected=[];
  claster_markers=[];
  var current_view=0;
  myData={};
  var selected_items=[];
  var total_selected=0;
  </code></pre>
  
  <p>thanks for your prompt answer.</p>