将任意一个jQuery对象进行表单序列化，免除了提交请求时大量拼写表单数据的烦恼，支持键值对<name&value>格式和JSON格式。

/// <reference name="jquery.js" description="1.3.2版本以上" />

/*!* 扩展jQuery表单序列化函数：{ Version: 1.2, Author: Eric.Zheng, CreateDate: 2010-12-21 }
*
* 消除了jQuery.serialize()只能对form进行序列化的局限
* 该插件可以对任意jQuery对象进行序列化
* 返回数据格式有两种：1.<name&value>(默认)  2.json
*
* 调用方法：$(dom).form_serialize(dataType);
*   参数(可省略)：dataType: 默认为html,即返回数据格式为<name&value>;若要返回json格式，则dataType = json;
* 返回数据：序列化表单数据
*
* BUG修复：修复了1.0版本中，多个Dom元素使用同一个name属性时，获取的数据有缺失。
*
**/
(function ($) {
var formJson = {};
var currentForm = null;

$.fn.form_serialize = function (dataType) {
currentForm = $(this);
formJson = {};
var doms = currentForm.find('[name]');
$.each(doms, function (index, dom) {
var domName = $(dom).attr('name');
if (!formJson[domName]) {
formJson[domName] = { Name: domName, Type: $(dom).attr('type'), Doms: currentForm.find('[name=' + domName + ']') };
}
});
return getResult(dataType);
};

var getResult = function (dataType) {
var d = {
toJson: function () {
var data = {};
$.each(formJson, function (key, json) {
data[key] = getVal(json);
});
return data;
},
toString: function () {
var val = '';
var index = 0;
$.each(formJson, function (key, json) {
var prefix = '&';
if (index == 0) prefix = '';
index++;
val += prefix + key + '=' + getVal(json);
});
return val;
}
};
return dataType == 'json' ? d.toJson() : d.toString();
}

var getVal = function (json) {
var methods = {
getDefaultVal: function (dom) {
return $(dom).val();
},
getSelectVal: function (dom) {
var val = '';
var selectType = $(dom).attr('type');
if (selectType == 'select-multiple') {
var items = $(dom).val();
if (items == null) return '';
for (var i = 0; i < items.length; i++) {
val += i == 0 ? items[i] : (',' + items[i]);
}
return val;
} else {
return $(dom).val();
}
},
getRadioVal: function (dom) {
return $(dom).attr('checked') ? $(dom).val() : null;
},
getCheckBoxVal: function (dom) {
return methods.getRadioVal(dom);
}
};

var dispacher = function (type, dom) {
switch (type) {
case 'text':
case 'password':
case 'hidden':
case 'textarea':
return methods.getDefaultVal(dom);
case 'select-one':
case 'select-multiple':
return methods.getSelectVal(dom);
case 'radio':
return methods.getRadioVal(dom);
case 'checkbox':
return methods.getCheckBoxVal(dom);
default:
return '';
}
};

var domType = json.Type;
var doms = $(json.Doms);
var count = doms.length;
if (count > 1) {
var val = '';
var index = 0;
for (var i = 0; i < count; i++) {
var v = dispacher(domType, doms.eq(i));
if (v == '' || v == null || v == undefined)
continue;
val += index++ == 0 ? dispacher(domType, doms.eq(i)) : (',' + dispacher(domType, doms.eq(i)));
}
return val;
} else {
return dispacher(domType, doms);
}
};
})(jQuery);