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XMLHttpRequest.responseText doesnt write the value when calling a URL

I ve written the code in both javascript and jquery to call a URL and get the return value by referring here and here.

但是,牛页的回报值在我的html档案中显示。自2006年以来我要问一下,我是否需要把呼吁作为交叉张贴? 如果是的话,你能否解释我?

www.un.org/Depts/DGACM/index_spanish.htm Java印代码为。

 <script type="text/javascript" >    
 var req ;
 // Browser compatibility check          
 if (window.XMLHttpRequest) {
 req = new XMLHttpRequest();
 } else if (window.ActiveXObject) {

 try {
 req = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {

 try {
 req = new ActiveXObject("Microsoft.XMLHTTP");
 } catch (e) {}
 }

}


var req = new XMLHttpRequest();
req.open("GET", "http://www.example.com/Default.aspx?usrname=john",true);
req.onreadystatechange = function () {
document.getElementById( divTxt ).innerHTML = "My Status: " + req.responseText;
}

req.send(null);
</script>

</script>
<html>
<head/>
<body>
<div id="divTxt"></div></body>
</html>

The output I get is : My Status :

The JQuery code is

 var html = $.ajax({
 url: "http://www.example.com/Default.aspx?usrname=john",
 async: true
 }).responseText;
 document.getElementById( divTxt ).innerHTML = "My Status: " + html;

The output I get is blank page

PS:我是。由于我的问题没有得到适当回答,这个问题再次出现。

** 本文件迟交。本文件迟交。

> EDIT: in my original code, there is

http://

** 本文件迟交。本文件迟交。

Answer 1

除非已执行 CORS。

If you need to get data from somewhere which is not same origin you need to use JSONP

另外,为了解答,试图从地点街上打电话,看你是否收到你要求的有效数据。

Answer 2

you are doing several things incorrectly.

First, you re overwriting your req variable (which you initialize for different browsers up on top). So, remove this line: var req = new XMLHttpRequest();

接下来,你再说一.,其范围与你所赢得的美加澳新人民军安全之道不同。另外,由于你不再允许你离开自己的领域,你又重新开始列入http://,但这只是一点。最后,你呼吁重新改革国家,但未能注意到将进入几个阶段的现成国家。你重新寻找第4阶段,实际上做些什么。

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