[jQuery] toJsonBy($form)

function toJsonBy($form){
    var arr = $form.serializeArray();
    var map = {};

    $.map(arr, function(n, i){
        map[n['name']] = n['value'];
    });

    return map;
}

var $form = $("#form");
var data = toJsonBy($form);

https://stackoverflow.com/questions/11338774/serialize-form-data-to-json

Serialize form data to JSON