AJAX提交表单数据实例分析

var TINY={}; 
TINY.ajax = function() { 
 return { 
   /** 
   * @param string type 请求类型,post,get（目前只实现了这两种） 
   * @param strng url 请求的地址 
   * @param object data 当使用post请求时的请求参数，ex: data=> {name:'adam'} 
   * @param function callback 成功返回时的回调函数 
   */ 
  call : function(type, url, data, callback) { 
   var xhr = window.XMLHttpRequest &＃63; new XMLHttpRequest : new ActiveXObject('Microsoft.XMLHTTP');// for ie 
   xhr.Onreadystatechange= function() { 
    if (xhr.readyState == 4 && xhr.status == 200) { 
     callback.call(this, xhr.responseText); 
    } 
   } 
   switch (type.toUpperCase()) { 
   case 'POST': 
    xhr.open('POST', url, true); 
    // 这句比较重要 
    xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded'); 
    var formData = ''; 
    for ( var i in data) { 
     formData += i + '=' + data[i] + '&'; 
    } 
    xhr.send(formData); 
    break; 
   default: 
    xhr.open('GET', url, true); 
    xhr.send(null) 
    break; 
   } 
  } 
 } 
}(); 

function serialForm(form){ 
 var e = form.elements; 
 var ht = new Array(); 
 var checkbox = new Array(); 
 for(var i = 0; i 

TINY.ajax.call('post', 'listfrom.do', serialForm(frm), function(data){ 
  var ret = eval('('+data+')'); 
  if(ret.errid==0){ 
   alert(ret.text); 
   window.location.reload(); 
  } 
  else{ 
   alert(ret.text); 
  } 
});

String str = "[{\"mailAddr\":\"edison@163.com\"}, {\"mailAddr\":\"jay@263.com\"}]";
response.setContentType("application/json;charset=UTF-8");
response.getWriter().write(str);

function show(){ 
 $.post("listmail.do", {"name" : "John"}, function(data){
  for(var i = 0; i