ajax 简单调用

js 代码

1. if (window.ActiveXObject && !window.XMLHttpRequest) {   
2.     window.XMLHttpRequest=function() {   
3.         return new ActiveXObject((navigator.userAgent.toLowerCase().indexOf('msie 5') != -1) ? 'Microsoft.XMLHTTP' : 'Msxml2.XMLHTTP');   
4.     };   
5. }   
6. function exeRequest(url,handle,v){   
7.     xmlHttp=new XMLHttpRequest();   
8.     xmlHttp.onreadystatechange=function (){   
9.                                                             if(xmlHttp.readyState==4){   
10.                                                                 if(xmlHttp.status==200){   
11.                                                                     var v=xmlHttp.responseText;   
12.                                                                     if(v=="xmlerr"){   
13.                                                                         alert("数据传输错误,请刷新页面重试");   
14.                                                                         return;   
15.                                                                     }   
16.                                                                     handle(v);   
17.                                                                 }   
18.                                                             }   
19.                                                         };   
20.     xmlHttp.open("post",url);   
21.     xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");   
22.     xmlHttp.send(v);   
23. }   
24.   
25. //example: arg0是发送的参数以key=value形式发送，或者以xml格式发送   
26. function doAjaxReq(arg0){   
27.     var url="";//发送的url,不能垮域请求   
28.     exeRequest(url,handelDoAjaxReq,arg0);   
29. }   
30. //方法回调，进行响应处理   
31. function handelDoAjaxReq(v){   
32.     if(v==1){   
33.         alert("请求成功");   
34.     }   
35. }