//globals
var minx;
var miny;
var maxx;
var maxy;

function checkBounds() {

  //GLog.write("in checkbounds");
	var bounds = googleMap.getBounds();
	var zoom = googleMap.getBoundsZoomLevel(bounds);
	southWest = bounds.getSouthWest();
	northEast = bounds.getNorthEast();
	lngSpan = northEast.lng() - southWest.lng();
	latSpan = northEast.lat() - southWest.lat();

	minx = southWest.lng();
	maxx = southWest.lng() + lngSpan;
	maxy = northEast.lat();
	miny = northEast.lat() - latSpan;
	
}