function pageSpecific(location) {
      if (location.indexOf('contact') >= 0) {
          initializeMap()
      }
  }
  
  function actLink(ev) {

      var location = ev.currentTarget.href
      if (location.indexOf(window.location.host) >= 0) {

          loadDoc(location, function () {
              history.pushState({
                  loc: location
              }, document.title, location)
          })

          return false
      }

  }
  

  function dynamiseLinks(el) {

      $("a", el).click(actLink)

  }
  

  function loadDoc(location, callback) {

      if (!callback) {
          callaback = function () {
              return undefined
          }
      }

      $.get(location + '?c', function (data) {
          mainContainer = $("#mainContainer")
          mainContainer.html(data)

          dynamiseLinks(mainContainer)
          pageSpecific(location)

          callback()

      })
  

  }
  

  function historyChange(ev) {
      loadDoc(ev.state.loc)
  }
  

  $(document).ready(function () {
      dynamiseLinks(document)

      pageSpecific(window.location.href)

      window.onpopstate = historyChange

  })
  
  function initializeMap() {
      var mapCanvas = document.getElementById('map-canvas');
      mapCanvas.innerHTML = ''
      var polytechPos = new google.maps.LatLng(50.6074998, 3.1373338);
      var mapOptions = {
          center: polytechPos,
          zoom: 16,
          mapTypeId: google.maps.MapTypeId.ROADMAP
      }
      var map = new google.maps.Map(mapCanvas, mapOptions)
      var marker = new google.maps.Marker({
          position: polytechPos,
          map: map,
          title: "Polytech Lille"
      });
  }