javascript – How to put a google map on JQUERY Mobile?

When tried to run the code , The map doesn’t show up, and it shows up this error"Google Maps API warning: NoApiKeys ". What are the possible solution for this?
This is the script that I have added:

<script src=""></script>

These are the codes that I have put at the js file:

$(document).ready(function () {
                var myOptions = {
                    zoom: 11,
                    center: new google.maps.LatLng(1.363083, 103.909836),
                    mapTypeId: google.maps.MapTypeId.ROADMAP
                var map = new google.maps.Map(document.getElementById('map_canvas'),

                var myLatlng = new google.maps.LatLng(1.443107  , 103.795681);
                var marker = new google.maps.Marker({
                    position: myLatlng,
                    map: map,
                    title: "Map "


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