var body;
var y;

Event.observe(window, 'load', window_onload);
function window_onload() {
    body = document.getElementsByTagName("BODY")[0];
    y = 0;
    //setInterval("shift_backcground()", 75);
}

function shift_backcground() {
    var position = "0px " + Math.ceil(y++) + "px";
    body.setStyle({ 'backgroundPosition': position });
}

function init_map(location) {
    var GaLat = "33.9587375104159";
    var GaLon = "-83.3754815667445";
    var NyLat = "40.6959735822525";
    var NyLon = "-73.9668048440457";
    var zoom = 13;

    var ga = document.getElementById("map_ga");
    var ny = document.getElementById("map_ny");

    if (location == "ny") {
        var latlng = new GLatLng(NyLat, NyLon);
        ga.style.fontWeight = "normal";
        ny.style.fontWeight = "bold";
    }
    else {
        var latlng = new GLatLng(GaLat, GaLon);
        ga.style.fontWeight = "bold";
        ny.style.fontWeight = "normal";
    }

    var map = new GMap2(document.getElementById('map_canvas'));
    map.setCenter(latlng, zoom);
    map.setUIToDefault();

    var options = { draggable: false };
    var marker = new GMarker(latlng, options);
    map.addOverlay(marker);

    //var html = '<h1>Athens, GA</h1>';
    //map.openInfoWindowHtml(latlng, html, { maxWidth: 50 }); 
}