function Ajax(recvType){
var aj=new Object();
aj.recvType=recvType ? recvType.toUpperCase() : 'HTML' //HTML XML
aj.targetUrl='';
aj.sendString='';
aj.resultHandle=null;
aj.createXMLHttpRequest=function(){
var request=false;
//window对象中有XMLHttpRequest存在就是非IE,包括(IE7,IE8)
if(window.XMLHttpRequest){
request=new XMLHttpRequest();
if(request.overrideMimeType){
request.overrideMimeType("text/xml");
}
//window对象中有ActiveXObject属性存在就是IE
}else if(window.ActiveXObject){
var versions=['Microsoft.XMLHTTP', 'MSXML.XMLHTTP', 'Msxml2.XMLHTTP.7.0','Msxml2.XMLHTTP.6.0','Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];
for(var i=0; i<versions.length; i++){
try{
request=new ActiveXObject(versions[i]);
if(request){
return request;
}
}catch(e){
request=false;
}
}
}
return request;
}
aj.XMLHttpRequest=aj.createXMLHttpRequest();
aj.processHandle=function(){
if(aj.XMLHttpRequest.readyState == 4){
if(aj.XMLHttpRequest.status == 200){
if(aj.recvType=="HTML")
aj.resultHandle(aj.XMLHttpRequest.responseText);
else if(aj.recvType=="XML")
aj.resultHandle(aj.XMLHttpRequest.responseXML);
}
}
}
aj.get=function(targetUrl, resultHandle){
aj.targetUrl=targetUrl;
if(resultHandle!=null){
aj.XMLHttpRequest.onreadystatechange=aj.processHandle;
aj.resultHandle=resultHandle;
}
if(window.XMLHttpRequest){
aj.XMLHttpRequest.open("get", aj.targetUrl);
aj.XMLHttpRequest.send(null);
}else{
aj.XMLHttpRequest.open("get", aj.targetUrl, true);
aj.XMLHttpRequest.send();
}
}
aj.post=function(targetUrl, sendString, resultHandle){
aj.targetUrl=targetUrl;
if(typeof(sendString)=="object"){
var str="";
for(var pro in sendString){
str+=pro+"="+sendString[pro]+"&";
}
aj.sendString=str.substr(0, str.length-1);
}else{
aj.sendString=sendString;
}
if(resultHandle!=null){
aj.XMLHttpRequest.onreadystatechange=aj.processHandle;
aj.resultHandle=resultHandle;
}
aj.XMLHttpRequest.open("post", targetUrl);
aj.XMLHttpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
aj.XMLHttpRequest.send(aj.sendString);
}
return aj;
}
//使用方法
<script type="text/javascript">
var ajax = Ajax(); // 实例化对象,默认为 HTTP,如果传入 XML,返回 XML 对象
// Ajax 的 get 方法使用说明
/**
* function(targetUrl, resultHandle)
* @param string targetUrl 传递过去的 URL 地址
* @param string resultHandle 回调函数,可选项
*/
ajax.get('test.php?name=liruxing&[email protected]', function(data) {
eval("var obj="+data);
alert(obj.name);
alert(obj.email);
});
// Ajax 的 post 方法使用说明
/**
* function(targetUrl, sendString, resultHandle)
* @param string targetUrl 传递过去的 URL 地址
* @param string sendString 参数值
* @param string resultHandle 回调函数,可选项
*/
ajax.post('test.php', 'name=liruxing&[email protected]', function(data){
eval("var obj="+data);
alert(obj.name);
alert(obj.email);
})
// post 第二种格式,第二个参数为 Json 格式
ajax.post('test.php', {name:'李茹星',email:'[email protected]'}, function(data){
eval("var obj="+data);
alert(obj.name);
alert(obj.email);
})
</script>