Jquery Ajax method

$.ajax({
     type: "GET",
     url: filename,
     async: false,
     beforeSend: function(x) {
      if(x && x.overrideMimeType) {
       x.overrideMimeType("application/j-son;charset=UTF-8");
      }
 },
 dataType: "json",
 success: function(data){
    //do your stuff with the JSON data
 }
});