Draw Polygons in Google Maps and Determine whether an Address is in Polygons

/**
 * Draw Polygons in Google Maps and Determine whether an Address is in Polygons
 *
 * This sample source code uses Google Maps Javascript API V3 to draw polygons in Google Maps.
 * (Refer https://google-developers.appspot.com/maps/documentation/javascript/examples/drawing-tools)
 * 
 * The address auto-complete uses Google Places Javascript library.
 * (Refer https://developers.google.com/maps/documentation/javascript/places#places_autocomplete)
 * 
 * The server-side code will retrieve address' latitude and longitude using Google Gecoding API.
 * (Refer https://developers.google.com/maps/documentation/geocoding/)
 * 
 * Using "Point-In-Polygon" Algorithm, the server-side code will determine whether address' coordinate is inside of polygons or outside.
 * (Refer http://alienryderflex.com/polygon/)  
 * 
 * ===== How To Use ===== 
 * 
 * First, draw polygons
 * Second, search address and click "Check Inside/Outside Polygons" submit button
 *  
 * ===== For Your Information =====
 * If you need client-side Javascript to determine whether an address is in/out polygons, 
 * you can use google.maps.geometry.poly.containsLocation function in Google Maps API.
 * (Refer https://developers.google.com/maps/documentation/javascript/reference#poly)
 * 
 * The address auto-complete (Google Places Library) returns address information including coordinate.
 * 
 * @author      Chris LEE 
 * 
 */