Google maps api

<script type="text/javascript">
  //<![CDATA[


  var map;
  var url = "mypath";
  var image = 'beachflag.png';


  function initialize() {
    // the central point of the map in lat and long
    var latlng = new google.maps.LatLng(54.5, -3);
    //options to set
    var myOptions = {
      <!--- Affects how far the map is zoomed in by default --->
      zoom: 5,
      center: latlng,
      // there are four map types to select from and set as a default, ROADMAP,SATELLITE,HYBRID,TERRAIN
      mapTypeId: google.maps.MapTypeId.TERRAIN
    };
    var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
  };


  function showClear() {
    if (document.getElementById("clear").checked == true) {
      var res = new Ajax.Request(
      url, {
        method: "get",  // Set the method of sending the variables
        parameters : {
          method: 'getClearLayer',
          returnformat: 'json'
        },
        // When the call has returned a value
        onComplete: outputMarkers
      }
      );
    }
  };


  function outputMarkers(transport) {
    results = transport.responseText.evalJSON();
    // if some results have been returned
    if (results.DATA.length > 0) {
      // Plot the markers
      for (i=0; i<=results.DATA.length; i++) {
      var marker = new google.maps.Marker({
            position: results.DATA[i][2],
            map: map,
            title:"New marker"
        });
        marker.setMap(map);
      }
    }
  };
  //]]>
</script>