Google map error: a is null

I have a program that I want to use google maps for. The problem is I get an error that says a is null where a is a var used in the google map api. Here is how I call my google map:

//Creates a new center location for the google map
    var latlng = new google.maps.LatLng(centerLatitude, centerLongitude);

    //The options for the google map
    var myOptions = {
        zoom: 7,
        maxZoom: 12,
        center: latlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    //Creates the new map
    var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

And here is what my HTML tag looks like:

<div id = "map_canvas"></div>

I get the lat and lng on page load through the url. These values are passed in correctly so I know that is not the problem. I think that it has to do with the var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions); not being correct. Any suggestions?

EDIT: Here is the error message:

a is null fromLatLngToPoint(a=null) yg(a=null, b=Object { zoom=7, maxZoom=12, more...}) d(d=Document Default.aspx?lat=30.346317&lng=105.46313, f=[function()]) d(a=undefined) d() [Break On This Error] function Qf(a){a=a.f[9];return a!=i?a:...);function sg(a){a[ic]&&a[ic]Vb}