If both attributes agree on their values (as they should), it&#39;s enough to read either of them. I&#39;d suggest using

    document.documentElement.lang

Just.

    document.getElementsByTagName(&#39;html&#39;)[0].getAttribute(&#39;lang&#39;);

And with the namespace

    document.getElementsByTagName(&#39;html&#39;)[0].getAttribute(&#39;xml:lang&#39;);


I am currently trying to find the parent of a parent of an element. I have a link being clicked that is in a `&lt;td&gt;`, and I&#39;d like to get the `&lt;tr&gt;` object.

Why wont &quot;$(this).parent().parent()&quot; work? What will?

Thanks,  
Brendan

**Edit:** It appears an error in my syntax was throwing the whole thing off. &quot;$(this).parent().parent()&quot; does in fact work, but I wound up going with $(this).closest(&#39;tr&#39;)&quot; because it seems like the most efficient solution.

jQuery parent of a parent

I am trying to install sqlite3 for PHP in Ubuntu.

I install `apt-get php5-sqlite3` and edited `php.ini` to include sqlite3 extension.

When I run `phpinfo();` I get

    SQLITE3
    SQLite3 support  enabled  
    sqlite3 library version  3.4.2  

as shown above, `sqlite3` is enabled. However, I get &quot;Class SQLite3 not found&quot; when I use

     new SQLite3(&quot;database&quot;);



how to enable sqlite3 for php?

How to obtain `lang` attribute in HTML using JavaScript?

    &lt;html xmlns=&quot;http://www.w3.org/1999/xhtml&quot; xml:lang=&quot;en&quot; lang=&quot;en&quot;&gt;

How to obtain lang attribute in HTML using JavaScript?

How to obtain <code>lang</code> attribute in HTML using JavaScript?
<pre><code class="hljs language-ini">&#x3C;html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
</code></pre>

A double quote even if escaped is throwing parse error.  
look at the code below

    //parse the json in javascript  
    var testJson = &#39;{&quot;result&quot;: [&quot;lunch&quot;, &quot;\&quot;Show\&quot;&quot;] }&#39;;  
    var tags = JSON.parse(testJson);  
    alert (tags.result[1]);

This is throwing parse error because of the double quotes (which are already escaped).  
Even `eval()` won&#39;t work here.  
But if i escape it with double slashes like this:

    var result = &#39;{&quot;result&quot;: [&quot;lunch&quot;, &quot;\\&quot;Show\\&quot;&quot;] }&#39;;  
    var tags = JSON.parse(result);  
    alert (tags.result[1]);

then it works fine.  
Why do we need to use double slash here in javascript?
The problem is that PHP `json_encode()` function escapes a double quote with a single slash (like this: `\&quot;show\&quot;`) which `JSON.parse` won&#39;t be able to parse. How do i handle this situation?



json parse error with double quotes

Is there something in JavaScript similar to `@import` in CSS that allows you to include a JavaScript file inside another JavaScript file?


How do I include a JavaScript file in another JavaScript file?

Is there a better way to engineer a `sleep` in JavaScript than the following `pausecomp` function ([taken from here][1])?

    function pausecomp(millis)
    {
        var date = new Date();
        var curDate = null;
        do { curDate = new Date(); }
        while(curDate-date &lt; millis);
    }


This is not a duplicate of https://stackoverflow.com/questions/758688/sleep-in-javascript-delay-between-actions; I want a *real sleep* in the middle of a function, and not a delay before a piece of code executes.


  [1]: http://www.sean.co.uk/a/webdesign/javascriptdelay.shtm

What is the JavaScript version of sleep()?

I would like to catch every undefined function error thrown. Is there a global error handling facility in JavaScript? The use case is catching function calls from flash that are not defined.

JavaScript global event mechanism

I have a string, `12345.00`, and I would like it to return `12345.0`.

I have looked at `trim`, but it looks like it is only trimming whitespace and `slice` which I don&#39;t see how this would work. Any suggestions?



How do I chop/slice/trim off last character in string using Javascript?

Eg: `h:inputText` will render a `&quot;input type=&#39;text&#39;&quot;`.
What jsf tag can render a `&quot;div&quot;` tag?

What jsf component can render a div tag?

I have a `div` tag with `width` set to **800 pixels**. When the browser width is greater than **800 pixels**, it shouldn&#39;t stretch the `div`, but it should bring it to the middle of the page.


How to align a &lt;div&gt; to the middle (horizontally/width) of the page

HTML being the most widely used language (at least as a markup language) has not gotten its due credit. &lt;br/&gt;
Considering that it has been around for so many years, things like the FORM / INPUT controls have still remained same with no new controls added.

So at least from the existing features, do you know any features that are **not well known** but very useful.

Of course, this question is along the lines of:

[Hidden Features of JavaScript][1]&lt;br /&gt;
[Hidden Features of CSS][2]&lt;br/&gt;
[Hidden Features of C#][3]&lt;br /&gt;
[Hidden Features of VB.NET][4]&lt;br /&gt;
[Hidden Features of Java][5]&lt;br /&gt;
[Hidden Features of classic ASP][6]&lt;br /&gt;
[Hidden Features of ASP.NET][7]&lt;br /&gt;
[Hidden Features of Python][8]&lt;br /&gt;
[Hidden Features of TextPad][9]&lt;br/&gt;
[Hidden Features of Eclipse][10]

Do not mention features of HTML 5.0, since it is in [working draft][11]&lt;br/&gt;

**Please specify one feature per answer**.&lt;br/&gt;


  [1]: https://stackoverflow.com/questions/61088
  [2]: https://stackoverflow.com/questions/628407
  [3]: https://stackoverflow.com/questions/9033
  [4]: https://stackoverflow.com/questions/102084
  [5]: https://stackoverflow.com/questions/15496
  [6]: https://stackoverflow.com/questions/2963484
  [7]: https://stackoverflow.com/questions/54929
  [8]: https://stackoverflow.com/questions/101268
  [9]: https://stackoverflow.com/questions/605439
  [10]: https://stackoverflow.com/questions/54886
  [11]: https://stackoverflow.com/questions/605439

Hidden features of HTML

Let&#39;s say you don&#39;t want other sites to &quot;frame&quot; your site in an `&lt;iframe&gt;`:

    &lt;iframe src=&quot;http://example.org&quot;&gt;&lt;/iframe&gt;

So you insert anti-framing, frame busting JavaScript into all your pages:

    /* break us out of any containing iframes */
    if (top != self) { top.location.replace(self.location.href); }

Excellent! Now you &quot;bust&quot; or break out of any containing iframe automatically. Except for one small problem.

As it turns out, **your frame-busting code can be busted**, [as shown here](http://coderrr.wordpress.com/2009/02/13/preventing-frame-busting-and-click-jacking-ui-redressing/):

    &lt;script type=&quot;text/javascript&quot;&gt;
        var prevent_bust = 0  
        window.onbeforeunload = function() { prevent_bust++ }  
        setInterval(function() {  
          if (prevent_bust &gt; 0) {  
            prevent_bust -= 2  
            window.top.location = &#39;http://example.org/page-which-responds-with-204&#39;  
          }  
        }, 1)  
    &lt;/script&gt;

This code does the following:

- increments a counter every time the browser attempts to navigate away from the current page, via the `window.onbeforeunload` event handler
- sets up a timer that fires every millisecond via `setInterval()`, and if it sees the counter incremented, changes the current location to a server of the attacker&#39;s control
- that server serves up a page with HTTP status code **204**, which does not cause the browser to navigate anywhere

My question is -- and this is more of a JavaScript puzzle than an actual *problem* -- how can you defeat the frame-busting buster? 

I had a few thoughts, but nothing worked in my testing:

- attempting to clear the `onbeforeunload` event via `onbeforeunload = null` had no effect
- adding an `alert()` stopped the process let the user know it was happening, but did not interfere with the code in any way; clicking OK lets the busting continue as normal
- I can&#39;t think of any way to clear the `setInterval()` timer

I&#39;m not much of a JavaScript programmer, so here&#39;s my challenge to you: **hey buster, can you bust the frame-busting buster?**

Frame Buster Buster ... buster code needed

I have a tabbed html form. Upon navigating from one tab to the other, the current tab&#39;s data is persisted (on the DB) even if there is no change to the data.

I would like to make the persistence call only if the form is edited. The form can contain any kind of control. Dirtying the form need not be by typing some text but choosing a date in a calendar control would also qualify.

One way to achieve this would be to display the form in read-only mode by default and have an &#39;Edit&#39; button and if the user clicks the edit button then the call to DB is made (once again, irrespective of whether data is modified. This is a better improvement to what is currently existing).

I would like to know how to write a generic javascript function that would check if any of the controls value has been modified ?

Content Type	Original Author	Original Content on Stackoverflow
Question	Gordian Yuan	View Question on Stackoverflow
Solution 1 - Javascript	Christoph	View Answer on Stackoverflow
Solution 2 - Javascript	Christophe Eblé	View Answer on Stackoverflow

How to obtain lang attribute in HTML using JavaScript?

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

how to enable sqlite3 for php?

jQuery parent of a parent

Attributions