摘要：
1 function createXHR(){ 2 if(typeof XMLHttpRequest != "undefined"){ 3 createXHR = function(){ 4 return new XMLHttpRequest(); 5 }; 6 }else if(typeof ActiveXObject != "undefined"){ 7 createXHR = function(){ 8 if(typeof arguments.callee.active... 阅读全文
