Simple Ajax Connection Library sharing

  has written a simple AJAX connection library without using jquery ajax, which is lighter than jquery, and you can use it as a reference,

  Code as follows: var ajax = { init:function () {  var xmlHttp = new XMLHttpRequest ();   if (!window. XMLHttpRequest)      xmlhttp=new ActiveXObject ("Microsoft.XMLHTTP");     return xmlHttp; &NBSP},  call:function (opt) {  var xmlHttp = This.init ();     Xmlhttp.onreadystatechange = function () {   if (xmlhttp.readystate===4)    {     xmlhttp.status===200?     &NBSP ; Opt.success (Xmlhttp.responsetext,xmlhttp.responsexml): Opt.error (Xmlhttp.responsetext,xmlhttp.status);   &NBSP}  }   Opt.data = This.parsedata (Opt.data);   if (opt.method.toLowerCase () = = ' Get ') {   opt.url = Opt.url + "?" + opt.data;    opt.data = Nu ll  }   Xmlhttp.open (Opt.method,opt.url,opt.async);   if (opt.method.toLowerCase () = = ' post ')    xmlhttp.setrequestheader ("Content-type", "application/ X-www-form-urlencoded ");   Xmlhttp.send (Opt.data); &nBSP;},  parsedata:function (data) {  if (typeof data = = ' object ') {   var str = ';    for (v Ar i in data {    str + = "&" +i+ "=" +encodeuricomponent (Data[i]);    }    return Str.leng Th==0? Str:str.substring (1);  }else{   return data  } &nbsp}