/*-----------------------------
ajax关键代码
将ajax封装成一个类
-----------------------------*/
function createAjax() {
var xmlHttp = false;
if (window.XMLHttpRequest) {
//mozilla
xmlHttp = new XMLHttpRequest();//ie6不支持XMLHttpRequest
if (xmlHttp.overrideMimeType) xmlHttp.overrideMimeType("text/xml");
}
else if (window.ActiveXObject) {
var MSXML = ['MSXML2.XMLHTTP.5.0', 'Microsoft.XMLHTTP', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];
var i;
for(i = 0; i < MSXML.length; i++){
try{
xmlHttp = new ActiveXObject(MSXML[i]);
break;
}
catch(e){}
}
}
if (!xmlHttp) { alert("error! fail to create an ajax instance!"); return false; }
this.rep = xmlHttp;
this.sendData = function(method, url, asy, fun) {
if (asy) {
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
fun(xmlHttp);
}
}
if (method == "POST") {
xmlHttp.open("POST", url, true);
xmlHttp.setRequestHeader("Conent-Type", "application/x-www-form-urlencoded");
xmlHttp.send(null);
}
else {
xmlHttp.open("GET", url, true);
xmlHttp.send(null);
}
}
else {
if (method == "POST") {
xmlHttp.open("POST", url, false);
xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xmlHttp.send(null);
}
else {
xmlHttp.open("GET", url, false);
xmlHttp.send(null);
}
return xmlHttp;
}
}
}