nodeValue vs value in JavaScript - javascript

Ok, so i have this HTML web page with nothing fancy on it right? The problem is that when I try to place an image on the screen without using CSS (with the traditional < img > tag), I get this error in FireFox:
Use of attributes' nodeValue attribute is deprecated. Use value instead.
The image display is simple, just the tag and the src.
Here is the code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<html>
<head>
<link rel="stylesheet" type="text/css" href="administration/stylesheet.css">
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<body>
<img src="administration/graphics/textlogo.png">
</body>
</html>
I hope someone knows what to do, cause I can't seem to find a solution.
Cheers!

Related

script tag doesn't work in head tag

script tag doesnt execute if i put it in head tag but works fine if i put it in body tag ..can anybody tell me the reason behind this?? here's my code
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<title>Untitled 1</title>
</head>
<body>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = Date();
</script>
</body>
</html>
That's because HTML is parsed from top to bottom. That means that when you try to get the element demo it is not yet created.
To make it work in the head tag you should add a listener that will fire when the page is fully loaded.
document.addEventListener("DOMContentLoaded", function() {
// Here the DOM elements are loaded, and you can get them with .getElementById.
document.getElementById("demo").innerHTML = Date();
});
The <head> is for including other files and libraries and such (you can also include them in the body). But if you want to actually write JS code to manipulate the body, you have to place it in the body.

External JS file not working in XHTML

I have a file named Reservation.xhtml and in it, I have the script tag in which the external js file is called.The Reservation.xhtml contains a form that i have downloaded from a website and also its javascript which i saved into "validate.js"
<script src="validate.js" type="text/javascript"></script>
When using Reservation.xhtml, the functions in the validate.js are not being called but when i change the extension of Reservation.xhtml to Reservation.html..The form works fine..So can anybody tell me why the validate.js works in the Reservation.html and not in the Reservation.xhtml.. Please suggest me how to make it work in Reservation.xhtml
According to my tests, there is nothing wrong with the thing you're doing.
I created such file:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/ xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Strict document</title>
</head>
<body>
<p>This is a strict XHTML document.</p>
<div id="validate" style="color:red"><tt>validate.js</tt> has not been called!</div>
<script src="validate.js" type="text/javascript"></script>
</body>
</html>
Linked script would alter the innerHTML and style of the div - and it worked in Firefox.
Now while it seems that the file extension and doctype do not matter, there are things that do.
Specifically, tagName which is a HTMLElement property, is different in HTML and XHTML:
In XHTML (or any other XML format), "span" would be alerted. In HTML, "SPAN" would be alerted instead. - MDN
This might cause your script not to perform some operations.

Why is CKEditor throwing a javascript error when I click or type in the text area?

CKEditor 4.2.1 (and 4.1.2) is randomly (doesn't happen every time) throwing a JavaScript error when performing very basic/simply interactions, like clicking in the editing area and/or typing in the editing area.
Here's my HTML:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>My Page</title>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
<script
type="text/javascript"
src="/assets/js/ckeditor_4.2.1_full/ckeditor.js"></script>
<script type="text/javascript">
$(function(){
CKEDITOR.replace('my_text');
});
</script>
</head>
<body>
<form method="post">
<textarea name="my_text">dfagasdf sdf<br /><br />dasf asdf</textarea>
</form>
</body>
</html>
When clicking or typing into the editing area I see multiple errors in my console:
Have you switched Document Mode to Quirks manually? This may be a reason (although CKEditor is supposed to work in QM and I know it does). Second thing - wrap <textarea> with <fieldset> or <p>. I've seen that it makes problems from time to time (and it's also incorrect to have textarea directly in form).
Edit: The page is running in Quirks Mode, because you've got incorrect DOCTYPE. You should have:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
Instead of:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
After fixing this, IE stops throwing this error.
PS. You shouldn't also use ISO-8859-1 encoding, which is poor and may lead to issues. Use UTF-8 instead.

Getting Render Page Source with Javascript

I have following 2 files as below:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script>
function init(){
document.getElementById("mytest").innerHTML= "Results after rendering...";
}
</script>
<body onload="init();"><div id="mytest">OK</div>
</body>
</html>
The second page usually give the alert popup all source code of first page.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script>
xmlhttp.open("GET", "test.html",true);
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4) {
alert(xmlhttp.responseText)
}
}
xmlhttp.send(null)
</script>
<body>
</body>
</html>
All I want to do is I would like to get ONLY source code after rendering. How can get all code after rendering instead of getting all original code. So i can read < div id="mytest">Results after rendering...< / div> when I try with XMLHTTP. How can I do how to get the code which are already render for page, I want only with classic Javascript or DOM, I don't want with Jquery, JSON, Mootool at all. thanks in advance.
Instead of loading the page with ajax, use your browser's iframe support to your advantage.
Change the second file that alerts the HTML source to something like this:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script>
function displayAlert()
{
alert(document.getElementById('iframe').contentDocument.body.innerHTML);
}
</script>
<body onload="displayAlert()">
<iframe src="test.html" id="iframe" style="display:none;"></iframe>
</body>
</html>
This will load test.html in an invisible iframe. Your browser will automatically render test.html inside the iframe and will call displayAlert() when it is done. displayAlert() will grab the the source code inside the iframe and alert it. However, this solution will only work if test.html is on the same server as the script above. If test.html is on a completely different server, this solution will not work because the permission to access the iframe will be denied. If this is the case, I can let you know of another solution that will bypass this.
I'm not sure I know what you're really asking, but why not just get:
alert(document.body.innerHTML);
to get the actual rendered body HTML with any changes that have been made by scripts upon loading.
Note: even unmodified parts of innerHTML will not always compare exactly to the original source HTML because in some cases browsers are reconstituting the innerHTML from some other parsed data form so attributes may not have the same quoting or be in the same order and capitalization may not be the same.

Who does my script tag effect the page rendering?

I've got this code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<script type="text/javascript" href="http://code.jquery.com/jquery-1.5.min.js" />
<title>JQuery Demo 1</title>
<style type="text/css">
#box
{
background-color: #ff0000;
}
</style>
<script type="text/javascript">
</script>
</head>
<body>
<div id="box">----Text----!</div>
</body>
</html>
When I include the Jquery file from Google, the div "box" stops being red. When I remove the JQuery file, it becomes red again. WHY?
Try not using self closing syntax for your script element, e.g.
<script type="text/javascript" src="http://code.jquery.com/jquery-1.5.min.js"></script>
...and the correct attribute to point to a script file is src, not href.
See it on jsFiddle.
In XHTML <script /> means "A complete script element" (note, browsers decide if a document is XHTML or HTML based on the content-type HTTP header, not the Doctype).
In HTML <script /> means "A start tag for a script which starts with a > character", but for historical reasons, it gets treated as "A start tag for a script with a funny attribute that I'll ignore".
So, you have a script element that you open, but it doesn't get closed until the </script> tag for the second script element. The <style> element is inside the script, so it gets treated as JavaScript instead of HTML. Since the script specifies a src the inline script (including the style element) is ignored.

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