ajax操作笔记//ie9跨域设置引入JQ$.support.cors=true;//防止ajax重复加载请求需放在

// ie9 跨域设置

引入JQ

$.support.cors = true;

// 防止ajax重复加载请求需放在ajax请求之前

var pendingRequests = {};jQuery.ajaxPrefilter(function (options, originalOptions, jqXHR) {  var key = options.url;  console.log(key);  if (!pendingRequests[key]) {    pendingRequests[key] = jqXHR;  } else {    //jqXHR.abort();    //放弃后触发的提交    pendingRequests[key].abort(); // 放弃先触发的提交  }  var complete = options.complete;  options.complete = function (jqXHR, textStatus) {    pendingRequests[key] = null;    if (jQuery.isFunction(complete)) {      complete.apply(this, arguments);    }  };});