xmlhttprequest.js

十大精典PHP项目开发全程案例+代码

/* Create a new XMLHttpRequest object to talk to the Web server */
var xmlHttp = false;
try {
  	xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
  	try {
    		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
  	} catch (e2) {}
}

if (!xmlHttp && typeof XMLHttpRequest != "undefined") {
	try
	{
  		xmlHttp = new XMLHttpRequest();
	}catch(e3){ xmlHttp = false;}
}