blocks|key|264778|text|这个url有多远？是来自同一个域名吗？代码看起来没问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|264779|尝尝这个|264780|$.ajaxSetup({async:false});
$.get(remote_url,+function(data)+{+remote+=+data;+});
//+or
remote+=+$.get(remote_url).responseText;|code-block|syntax|javascript|264781|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

how remote is that url ? is it from the same domain ? the code looks okay

try this

<pre><code>$.ajaxSetup({async:false});
$.get(remote_url, function(data) { remote = data; });
// or
remote = $.get(remote_url).responseText;
</code></pre>

blocks|key|259256|text|当您发出同步请求时，这应该是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|259257|function+getRemote()+{
++++return+$.ajax({
++++++++type:+"GET",
++++++++url:+remote_url,
++++++++async:+false
++++}).responseText;
}|code-block|syntax|javascript|259258|示例-+http://api.jquery.com/jQuery.ajax/#example-3|offset|length|259259|请注意：将async属性设置为false是不推荐使用的，并且正在被删除(link)。包括Firefox和Chrome在内的许多浏览器已经开始在控制台中打印警告，如果您使用以下命令：|style|BOLD|259260|Chrome：|259261|主线程上的|259262|+Synchronous+XMLHttpRequest已被弃用，因为它会对最终用户的体验造成不利影响。有关更多帮助，请查看https://xhr.spec.whatwg.org/。|blockquote|259263|259264|259265|Firefox：|259266|259267|+Synchronous+XMLHttpRequest已被弃用，因为它会对最终用户的体验造成不利影响。有关更多帮助，请访问http://xhr.spec.whatwg.org/|259268|259269|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/jQuery.ajax/#example-3|1|https://xhr.spec.whatwg.org/#sync-warning|2|https://xhr.spec.whatwg.org/|3|http://xhr.spec.whatwg.org/^0|0|0|4|18|0|0|0|4|L|6|10|4|1|0|0|0|1P|S|2|0|0|0|0|0|1P|R|3|0|0^^$0|@$1|2|3|4|5|6|7|1H|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1I|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1J|8|@]|9|@$I|1K|J|1L|1|1M]]|A|$]]|$1|K|3|L|5|6|7|1N|8|@$I|1O|J|1P|M|N]|$I|1Q|J|1R|M|N]]|9|@$I|1S|J|1T|1|1U]]|A|$]]|$1|O|3|P|5|6|7|1V|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1W|8|@]|9|@]|A|$]]|$1|S|3|T|5|U|7|1X|8|@]|9|@$I|1Y|J|1Z|1|20]]|A|$]]|$1|V|3|-4|5|6|7|21|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|22|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|23|8|@]|9|@]|A|$]]|$1|Z|3|R|5|6|7|24|8|@]|9|@]|A|$]]|$1|10|3|11|5|U|7|25|8|@]|9|@$I|26|J|27|1|28]]|A|$]]|$1|12|3|-4|5|6|7|29|8|@]|9|@]|A|$]]|$1|13|3|-4|5|6|7|2A|8|@]|9|@]|A|$]]]|14|$15|$5|16|17|18|A|$19|1A]]|1B|$5|16|17|18|A|$19|1C]]|1D|$5|16|17|18|A|$19|1E]]|1F|$5|16|17|18|A|$19|1G]]]]

As you're making a synchronous request, that should be

<pre><code>function getRemote() {
 return $.ajax({
 type: "GET",
 url: remote_url,
 async: false
 }).responseText;
}
</code></pre>

Example - <a href="http://api.jquery.com/jQuery.ajax/#example-3" rel="noreferrer">http://api.jquery.com/jQuery.ajax/#example-3</a>

PLEASE NOTE: Setting async property to false is deprecated and in the process of being removed (<a href="https://xhr.spec.whatwg.org/#sync-warning" rel="noreferrer">link</a>). Many browsers including Firefox and Chrome have already started to print a warning in the console if you use this:

Chrome:

<blockquote>
 Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check <a href="https://xhr.spec.whatwg.org/" rel="noreferrer">https://xhr.spec.whatwg.org/</a>.
</blockquote>

Firefox:

<blockquote>
 Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help <a href="http://xhr.spec.whatwg.org/" rel="noreferrer">http://xhr.spec.whatwg.org/</a>
</blockquote>

blocks|key|2952282|text|您错误地使用了ajax函数。因为它是同步的，所以它将像这样返回内联数据：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2952283|var+remote+=+$.ajax({
++++type:+"GET",
++++url:+remote_url,
++++async:+false
}).responseText;|code-block|syntax|javascript|2952284|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You're using the ajax function incorrectly. Since it's synchronous it'll return the data inline like so:

<pre><code>var remote = $.ajax({
 type: "GET",
 url: remote_url,
 async: false
}).responseText;
</code></pre>

blocks|key|263223|text|function+getRemote()+{
++++return+$.ajax({
++++++++type:+"GET",
++++++++url:+remote_url,
++++++++async:+false,
++++++++success:+function+(result)+{
++++++++++++/*+if+result+is+a+JSon+object+*/
++++++++++++if+(result.valid)
++++++++++++++++return+true;
++++++++++++else
++++++++++++++++return+false;
++++++++}
++++});
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|263224|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>function getRemote() {
 return $.ajax({
 type: "GET",
 url: remote_url,
 async: false,
 success: function (result) {
 /* if result is a JSon object */
 if (result.valid)
 return true;
 else
 return false;
 }
 });
}
</code></pre>

I've done some jQuery in the past, but I am completely stuck on this. I know about the pros and cons of using synchronous ajax calls, but here it will be required. 

The remote page is loaded (controlled with firebug), but no return is shown.

What should I do different to make my function to return properly?

<pre><code>function getRemote() {

 var remote;

 $.ajax({
 type: "GET",
 url: remote_url,
 async: false,
 success : function(data) {
 remote = data;
 }
 });

 return remote;

}
</code></pre>

jQuery: Performing synchronous AJAX requests

jQuery

我以前做过一些jQuery，但我完全被困在这里了。我知道使用同步ajax调用的优缺点，但这里需要使用同步ajax调用。远程页面已加载(由firebug控制)，但未显示任何返回。我应该怎么做才能使我的函数正确返回？function getRemote() {    var remote;    $.ajax({     ...

问jQuery:执行同步AJAX请求
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