Google maps Initial marker won''t show up - google-maps-api-3

Question

The code I found for this google map seems to work fine but, The initial marker isn't showing up when I load the map. The map is centered on the initial location but with no Marker. I'm using the php to populate the initial Lat and Lon. Also is there a way to remove the old marker once dragged to a new location?
// global "map" variable
var map = null;
var marker = null;
// popup window for pin, if in use
var infowindow = new google.maps.InfoWindow({
size: new google.maps.Size(150,50)
});
// A function to create the marker and set up the event window function
function createMarker(latlng, name, html) {
var contentString = html;
var marker = new google.maps.Marker({
position: latlng,
map: map,
zIndex: Math.round(latlng.lat()*-100000)<<5
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.setContent(contentString);
infowindow.open(map,marker);
});
google.maps.event.trigger(marker, 'click');
return marker;
}
function initialize() {
// the location of the initial pin
var myLatlng = new google.maps.LatLng(<?=$a1[lat]?>,<?=$a1[lon]?>);
// create the map
var myOptions = {
zoom: 12,
center: myLatlng,
mapTypeControl: true,
mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
navigationControl: true,
mapTypeId: google.maps.MapTypeId.SATELLITE
}
var myMarker = new google.maps.Marker({
position: new google.maps.LatLng(<?=$a1[lat]?>, <?=$a1[lon]?>),
draggable: true
});
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
// establish the initial marker/pin
var myMarker = new google.maps.Marker({
position: new google.maps.LatLng(<?=$a1[lat]?>, <?=$a1[lon]?>),
draggable: true
});
// establish the initial div form fields
formlat = document.getElementById("latbox").value = myLatlng.lat();
formlng = document.getElementById("lngbox").value = myLatlng.lng();
// close popup window
google.maps.event.addListener(map, 'click', function() {
infowindow.close();
});
// removing old markers/pins
google.maps.event.addListener(map, 'click', function(event) {
//call function to create marker
if (marker) {
marker.setMap(null);
marker = null;
}
// Information for popup window if you so chose to have one
marker = createMarker(event.latLng, "name", "<font color=#660000><b><?=$a1[name]?></b><br>"+event.latLng);
var image = '/images/googlepins/pin2.png';
var myLatLng = event.latLng ;
/*
var marker = new google.maps.Marker({
by removing the 'var' subsquent pin placement removes the old pin icon
*/
marker = new google.maps.Marker({
position: myLatLng,
map: map,
icon: image,
title:"Property Location"
});
// populate the form fields with lat & lng
formlat = document.getElementById("latbox").value = event.latLng.lat();
formlng = document.getElementById("lngbox").value = event.latLng.lng();
});
}
//]]>

Answer 1

The Map-Tag needed to be added. I had someone try help me but, when his answer created more problems he removed his answer and then down voted my question.... Thanks Buddy.. Here is where the Map-Option needed to go.
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
// establish the initial marker/pin
var myMarker = new google.maps.Marker({
position: new google.maps.LatLng(<?=$a1[lat]?>, <?=$a1[lon]?>),
map: map, /// <-------This is what I added and seems to have fixed my problem
draggable: true,
});