How come my setCenter doesn't work? - google-maps

Question

I'm trying to get my map to re-orient to a new center when a user
chooses a district within the main map from a dropdown menu. See the
map here: http://bilware.net/BullyMap/BullyMap.html
I can get the zoom to change using map.setZoom (although it's
commented out below). But map.setCenter won't work. I thought it was
because I wasn't calling LatLng parameters correctly, but discovered
it won't work even if I plug in fixed parameters, as I think I've done
below.
I'm very new to this; any help is appreciated.
function changeMap() {
var selected_bully_table = $('#map_menu').val();
var searchString = document.getElementById('searchString').value.replace("'", "\\'");
if(searchString == "") {
layer.setQuery("SELECT 'geometry' FROM " + selected_bully_table);
return;
}
layer.setQuery("SELECT 'geometry' FROM " + selected_bully_table + " WHERE 'SDNAME' = '" + searchString + "'");
// Now zoom and center the map
{
map.setZoom(9);
myLatLng=(-91.9240850749,47.9119132072);
map.setCenter(myLatLng);
}
}

Answer 1

Replace
myLatLng=(-91.9240850749,47.9119132072);
with
myLatLng= new google.maps.LatLng(-91.9240850749,47.9119132072);

Answer 2

your latitude value should be between -90 degrees and +90 degrees and also you should pass a new instance of google.maps.LatLng class to the setCenter function.

Answer 3

A combination of the two other answers will give you your real answer.
The reason doing
myLatLng= new google.maps.LatLng(-91.9240850749,47.9119132072);
gives you a gray screen is because the position is outside of the bounds of the map. If you zoom out and scroll the map upwards you will see this :)
What you need to do is write
map.setZoom(9);
myLatLng = new google.maps.LatLng(LATITUDE,LONGITUDE);
map.setCenter(myLatLng);
and pass values of LATITUDE & LONGITUDE that are within the bounds of the map like (51, 0).