Ajax 对象创建 兼容各个浏览器 通用方法getHTTPObject.js

function getHTTPObject(){

if(typeof XMLHttpRequest == "undefined")

XMLHttpRequest = function(){

try{return new ActiveXObject("Msxml2.XMLHTTP.6.0");}

catch(e){}

try {return new ActiveXObject("Msxml2.XMLHTTP.3.0");}

catch(e){}

try{return new ActiveXObject("Msxml2.XMLHTTP");}

catch(e){}

return false;

}

return new XMLHttpRequest();

}

// var request = new XMLHttpRequest();

// alert(request)