JavaScript - Crear Mapa desde dirección base de datos

<script type="text/javascript">

			function initialize() {

				var latlng = new google.maps.LatLng(30.000000, -0.00000000);// Aquí introduzco las coordenadas

				var settings = {

					zoom: 17,

					center: latlng,

					mapTypeControl: true,

					mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},

					navigationControl: true,

					navigationControlOptions: {style: google.maps.NavigationControlStyle.SMALL},

					mapTypeId: google.maps.MapTypeId.ROADMAP};

				var map = new google.maps.Map(document.getElementById("Plano"), settings);

				var contentString = '<div id="content">'+

					'<div id="siteNotice">'+

					'</div>'+

					'<div id="bodyContent">'

					'</div>'+

					'</div>';

				var infowindow = new google.maps.InfoWindow({

					content: contentString

				});

				var companyImage = new google.maps.MarkerImage('images/logo.png',

					new google.maps.Size(100,50),

					new google.maps.Point(0,0),

					new google.maps.Point(50,50)

				);

				var companyShadow = new google.maps.MarkerImage('images/logo_shadow.png',

					new google.maps.Size(130,50),

					new google.maps.Point(0,0),

					new google.maps.Point(65, 50));

				var companyPos = new google.maps.LatLng(30.000000, -0.00000000);// Aquí introduzco las coordenadas

				// con esto sale el logo normal

                var companyMarker = new google.maps.Marker({

                    position: companyPos,

                    map: map,

                    title:"Calle La que sea, 00"

                    });

			}

		</script>

<div id="Plano" style="width:680px; height:380px"></div>// aquí muestro el mapa