html form 转 json

  $.fn.serializeObject = function () {
        var o = {};
        var a = this.serializeArray();
        $.each(a, function () {
            if (o[this.name]) {
                o[this.name] = o[this.name] + "$" + this.value;
            } else {
                o[this.name] = this.value || '';
            }
        });
        return o;
    };