How to Query JSON Data in Ajax Request

How to Query JSON Data in Ajax Request

I have a json file as:
  1. {"markers":[
        { "latitude":11.58655, "longitude":122.755402, "type":"A"},
        { "latitude":11.00698, "longitude":124.612801, "type":"B"},
        { "latitude":10.30723, "longitude":123.898399, "type":"A"},
        { "latitude":11.24775, "longitude":125.003502, "type":"C"},
        { "latitude":11.03693, "longitude":125.719498, "type":"Z"}
    ]}






and an ajax request as:

  1. $.ajax({ 
           type: "POST", 
           url: 'data.txt', 
           dataType: 'json', 
            success: function(data){  locations.length = 0;
            for (p = 0; p < data.markers.length; p++) { 
               locations.push(Array(data.markers[p].latitude,data.markers[p].longitude)); 
                var marker = new google.maps.Marker({
                   position: new google.maps.LatLng(data.markers[p].latitude,data.markers[p].longitude), 
                   map: map,  title:"marker "+p  });  }  }, 
                   error: function (xhr,status,errorStr) { 
                     alert("status="+status+", error="+errorStr); 
                   }  
      });














which is working fine for me but I need to get the data based on their TYPE.Can you please let me know if there is  a way I can request based on a type like "A" so I get ONLY data that have a TYPE = A