XMLHTTP---介绍

var xmlHttpRequest;

function CreateXMLHttp()

{

if (window.XMLHttpRequest)

{ //针对Firefox， Mozillar, Opera, Safari, IE7, IE8

xmlHttpRequest=new XMLHttpRequest();

}

else if (window.ActiveXObject)

{ //针对IE6, IE5.5, IE5 前面的ActiveX插件版本较新

var activeName=["MSXML2.XMLHTTP", "Microsoft.XMLHTTP"]; for (var i=0;i<activeName.length;i++)

{

xmlHttpRequest = new ActiveXObject(activeName[i]); }

}

return xmlHttpRequest;

}