mapping.js

  function initMap(lat, lng, zoom){
    var mapOptions = {center: new google.maps.LatLng(lat, lng), zoom: zoom, mapTypeId: google.maps.MapTypeId.ROADMAP};
    map = new google.maps.Map(document.getElementById('map'), mapOptions);
  }

  function addMarker(location){
    var position = new google.maps.LatLng(location.lat, location.lng);
    var marker = new google.maps.Marker({map:map, position:position, title:location.address});
    markers.push(marker);
  }

  function getLocation(){
    var geoOptions = {enableHighAccuracy: true, maximumAge: 1000, timeout: 60000};
    navigator.geolocation.getCurrentPosition(geoSuccess, geoError, geoOptions);
  }

  function geoSuccess(location) {
    lat = location.coords.latitude;
    lng = location.coords.longitude;
    $('#sort').show();
  }

  function geoError() {
    console.log('Sorry, no position available.');
  }
  
// =========================

    var geocoder = new google.maps.Geocoder();
    geocoder.geocode({address:address}, function(results, status){
      var name = results[0].formatted_address;
      var lat = results[0].geometry.location.lat();
      var lng = results[0].geometry.location.lng();