Show Google Maps Marker infoname on Mouseover of a Dynamically Generated DIV

I want to introduce a functionality which allows a marker’s infoname to appear or disappear upon mouseover or mouseout of a corresponding DIV element generated from jQuery. However, I am getting a “a is undefined” error on line 19 of main.js. After extensive testing on my script, I realise that this has something to do with the marker in the newly added lines as commented below:

function addMarker(A) {
 var point = new google.maps.LatLng(A.lat, A.lng);
 var image = new google.maps.MarkerImage('images/r.png',
  new google.maps.Size(30, 30),
  new google.maps.Point(0, 0),
  new google.maps.Point(0, 30));
 marker = new google.maps.Marker({
  map: map,
  position: point,
  icon: image,
 });
}

function addInfoName(A) {
 var infoname = new infoName; // custom object
 google.maps.event.addListener(marker, 'mouseover', function(event) {infoname.show();});
 google.maps.event.addListener(marker, 'mouseout', function(event) {infoname.hide();});
 infoname.open(map, marker);
}

function showResult(A) {
 $  ('#results').append('<DIV id=' + A.pid + '>{Blah Blah Blah}</DIV>');
 return document.getElementById(A.pid);
}

function process(json) {
 $  ('#results').empty();
 total = json.details.length;
 for(i=0; i<total; i++) {
  var detail = json.details[i];
  var marker;
  addMarker(detail);
  addInfoName(detail);

// these new lines are added
  var listDisplay = showResult(detail);
  listDisplay.onmouseover = function(){google.maps.event.trigger(marker, 'mouseover');};
  listDisplay.onmouseout = function(){google.maps.event.trigger(marker, 'mouseout');};
 }
}

google.maps.event.addListener(map, 'idle', function () {$  .getJSON(query, process);});

The error disappears if I merge the function addInfoName into process. However, all the DIVs will point to the last marker if I do so. My question is, how do I modify my script to achieve the functionality mentioned above?

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