google maps customized

gmaps-custom.js

<script>
  function initialize() {
    var mapCanvas = document.getElementById('mapsp');
    var myLatlng = new google.maps.LatLng(-92.22222, -78.11122);
    var iconBase = '<?php bloginfo('template_url'); ?>/img/';
    var mapOptions = {
      center: myLatlng,
      zoom: 16
    }
    var map = new google.maps.Map(mapCanvas, mapOptions);
    var marker = new google.maps.Marker({
      position: myLatlng,
      map: map,
      icon: iconBase + 'mapicon.png'
    });
    var contentString =  '';
    var infowindow = new google.maps.InfoWindow({
          content: contentString
      });

    google.maps.event.addListener(marker, 'click', function() {
      infowindow.open(map,marker);
    });
  }
  google.maps.event.addDomListener(window, 'load', initialize);
</script>