ajax封装函数和表单序列化

//表单序列化function iSerialize(form){   var parts={};   for(var i=0;i<form.elements.length;i++){      var filed=form.elements[i];      switch(filed.type){         case undefined:         case "submit":         case "reset":         case "file":         case "button":            break;         case "radio":         case "checkbox":            if(!filed.selected) break;         case "select-one":         case "select-multiple":         for(var j=0;j<filed.options.length;j++){            var option=filed.options[j];            if(option.selected){               var optValue="";               if(option.hasAttribute){                  optValue=(option.hasAttribute("value")?option.value:option.text);                 }else{                  optValue=(option.attributes("value").specified?option.value:option.text);                 }               parts[filed.name]=optValue;            }         }         break;         default:            parts[filed.name]=filed.value;      }   }   return parts;}

//封装ajaxfunction iAjax(obj) {   var xhr = (function () {      if (typeof XMLHttpRequest != ‘undefined‘) {         return new XMLHttpRequest();      } else if (typeof ActiveXObject != ‘undefined‘) {         var version = [                              ‘MSXML2.XMLHttp.6.0‘,                              ‘MSXML2.XMLHttp.3.0‘,                              ‘MSXML2.XMLHttp‘         ];         for (var i = 0; version.length; i ++) {            try {               return new ActiveXObject(version[i]);            } catch (e) {               //跳过            }           }      } else {         throw new Error(‘您的系统或浏览器不支持XHR对象！‘);      }   })();   obj.url = obj.url + ‘?rand=‘ + Math.random();   obj.data = (function (data) {      var arr = [];      for (var i in data) {         arr.push(encodeURIComponent(i) + ‘=‘ + encodeURIComponent(data[i]));      }      return arr.join(‘&‘);   })(obj.data);   if (obj.method === ‘get‘) obj.url += obj.url.indexOf(‘?‘) == -1 ? ‘?‘ + obj.data : ‘&‘ + obj.data;   if (obj.async === true) {      xhr.onreadystatechange = function () {         if (xhr.readyState == 4) {            callback();         }      };   }   xhr.open(obj.method, obj.url, obj.async);   if (obj.method === ‘post‘) {      xhr.setRequestHeader(‘Content-Type‘, ‘application/x-www-form-urlencoded‘);      xhr.send(obj.data);       } else {      xhr.send(null);   }   if (obj.async === false) {      callback();   }   function callback() {      if (xhr.status == 200) {         obj.success(xhr.responseText);       //回调传递参数      } else {         alert(‘获取数据错误！错误代号：‘ + xhr.status + ‘，错误信息：‘ + xhr.statusText);      }     }}

原文地址：https://www.cnblogs.com/wxiang/p/9083165.html