I need to implement on my php page map. I have container <div id="map"></div> which is inside other div, and I put this code inside <head> tag but it doesn’t show at all. Can anybody help me?

<script type="text/javascript" src="javascript/jquery-1.4.3.js"></script>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
(function() {
    window.onload = function() {
        var mapDiv = document.getElementById('map');
        var latlng = new google.maps.LatLng(37.09, -95.71);
        var options = {
            center: latlng,
            zoom: 4,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        var map = new google.maps.Map(mapDiv, options);