function smartRollover() {
  if(document.getElementsByTagName) {
    var images = document.getElementsByTagName("img");

    for(var i=0; i < images.length; i++) {
      if(images[i].getAttribute("src").match("_off."))
      {
        images[i].onmouseover = function() {
          this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
        }
        images[i].onmouseout = function() {
          this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
        }
      }
    }
  }
}

if(window.addEventListener) {
  window.addEventListener("load", smartRollover, false);
}
else if(window.attachEvent) {
  window.attachEvent("onload", smartRollover);
}



function initialize() {
  var centerPos = new google.maps.LatLng(35.669550, 139.772840);
  var mapOptions = {
    zoom : 15,
    center : centerPos,
    scrollwheel : false,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };
  var map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
  createMarker(map, centerPos);
}

function createMarker(map, pos) {
  var image = new google.maps.MarkerImage("../image/common/flag.png");

  var flagShape = {
    type : "poly",
    coord : [50,0, 50,19, 144,0, 144,19]
  };

  var marker = new google.maps.Marker({
    position : pos,
    map : map,
    icon : image,
    shape : flagShape
  });
}