Reading An HTML Document & Extracting Content
Jul 23, 2005
I'm an ASP developer by trade, but I've had to create client side
scripts with JavaScript many times in the past. Simple things, like
validating form elements and such.
Now I've been assigned the task of extracting content from a given HTML
page. If anyone's familiar with the Yahoo! Store order confirmation
screen, I need to be able to grab the total amount from the table to
the right-hand side. (Sample File:
http://www.2beyourself.com/t/sample.html)
If you view the source, this is in a table and enclosed with ugly html.
the value I want to retrieve is wrapped with b tags. Originally I was
thinking of using innerHTML or innerText for extracting the value. But
I find that we cannot gain control of this piece of the Yahoo! Store to
make it work!
So after talking with peers, we thought of reading in the entire HTML
page and using regular expressions to try and extract the value.
Something along the lines of: '<b>[0-9]+.[0-9]{2}</b/>'
I'm not sure how to accomplish this. Could someone please point me in
the right direction? If this solution is even a good one. If you have
something better, I'm all ears! (eyes) If using the regular expression
would be a good solution, I need to find out how to read in the entire
HTML doc, and then parse out that piece.
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Jul 23, 2005
I'm building a tree control that lazily loads branches of the tree
using the document.load() method.
The external XML document that is loaded is generated by a servlet as
XHTML. What I would like to do is to add the new tree branch to the
correct place in the document in the browser window using the innerHTML
property of the parent node.
The relevant code snippet that I've written to do this is:
var target = document.getElementById(parentId);
target.innerHTML = xmlDoc.documentElement.xml;
This doesn't work, furthermore looking at the W3C DOM API it would seem
that the document.xml property is a Microsort proprietary extension
which makes it unsuitable for my application.
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Feb 1, 2007
I'm attempting to write a quick piece of Javascript code that will
validate if the end user of the javascript has the necessary VML
attributes set in their HTML. The problem in IE is that "xmlns:v"
does not appear in their attributes property or the
getAttribute('xmlns:v') calls. The real kicker is that the 'xmlns'
attribute does return something.
The HTML Snippet would look like this:
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Nov 4, 2011
I'm using DOM in javascript to extract data from a dynamically generated html table( table id ="tableId"). Each cell of the table includes an input field to get user input. The problem is below javascript returns "null" always when retrieving the input field value? What I'm doing wrong here?
var mytable = document.getElementById('tableId');
var mytablebody = mytable.getElementsByTagName("tbody")[0];
var myrow = mytablebody.getElementsByTagName("tr")[0];[code]....
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Apr 4, 2009
To read a cookie:
Code:
<script language=javascript>
<!--
var cook=document.cookie.split(";");
var pieces=cook[0].split("=");
document.writeln("Your javascript cookie is called: " + pieces[0] + "<br>");
document.writeln("Its value is: " + pieces[1]);
//-->
</script>
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Dec 9, 2011
I have a costestimatorslider using jquery ui slider as:
$(function() {
As you can see I can add the value from the slider ui.value without any problem.Now I would like to be able to ADD or Extract the$('.cost') value to other value as Total(total=parseInt($('#total').html());.) which is Sum of some other calculations stored in a HTML table cell in the page as:
I tried to do it by this way butFirstof all it doubled the value which makesense and it's wrong!, besides itcouldn'textract the cost from the total.
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Dec 20, 2003
The questions "Can I read a file... " show up on the regular basis. The answer to accessing files on the same domain is the XMLHTTP object. Following is a simple wrapper that accounts for differences in Gecko and IE5.5+ implementation and returns the content of a file in a string, or null if an error occured:
function getFile(filename)
{ oxmlhttp = null;
try
{ oxmlhttp = new XMLHttpRequest();
oxmlhttp.overrideMimeType("text/xml");
}
catch(e)
{ try
{ oxmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{ return null;
}
}
if(!oxmlhttp) return null;
try
{ oxmlhttp.open("GET",filename,false);
oxmlhttp.send(null);
}
catch(e)
{ return null;
}
return oxmlhttp.responseText;
}
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Oct 13, 2011
I am using the following html and trying to read the content of the first cell of given row. I am getting null value
<
table
border
=
"1"
[Code]....
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Dec 14, 2011
I need to to open a survey page to users who has not anwseredthe survey yet.The survey is in the same domain / path than the main page.If users has allredy anwsered the survey, the page opens with title "Error" and there is error message in the body.I can open the new window from the main page, but I do not know if it is possible to read the title or document content of the new window.I can not edit the survey page to put code there.f I could determine with an if question, did the survey page open to the survey or the error page,then I could close the page or close the main page to bring the survey on top.Is this possible to do?
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Mar 24, 2009
I`m trying to write XML in HTML and read it with JavaScript, but it`s not working.
my XML in HTML.
Code:
<xml id="xmldata" style='display:none;'>
<markers>
<marker lat="50.895842" lng="-1.4051" html="text"/>
[Code]....
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Sep 6, 2009
Suppose a HTML document has a iframe. Using javascript,I want to detect ,on load of the html document, whether the body of the iframe document is ready to be displayed.I want to be able to overwrite the the body contents (before it actullay loads) of the iframe.can I do it with jquery? say if ,HTML doc is
Code:
<html><head></head><body><iframe id="ifrmId" src="http://www.google.com" ></iframe></body></html>
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Feb 9, 2010
i want to save my html document as an microsoft word document will
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Mar 17, 2007
Normally an SVG document is loaded/parsed/interpreted inside an HTML
document using an 'object' (or 'embed') element, although there are
supposedly other ways too. The problem is, the SVG document must be
static this way.
I want to use the DOM interface to build SVG dynamically inside an HTML
document. I am guessing I can build it inside HTML within an 'object' (or
maybe 'iframe'?) element.
My intentions/goals:
In Javascript, I construct an object 'embedSVG' which has properties and
methods for creating valid SVG elements and setting their attributes and
attribute values.
During construction, the SVG document is created with its root element.
During debugging in FF 2.0 (I'll work on an MSIE-compatible format later),
I am using the Mozilla DOM Inspector and comparing nodes when the
'object' element is loading a valid external SVG document, and when I am
appending the child representing the SVG document created by the DOM
functions.
However the child node (#document) does not specify 'svg' as the root
element, but instead 'HTML'. Something is not working.
Here is the relevant code in 'ScriptTest.html' which is the HTML in which
the SVG is supposed to be embedded. Below it is the relevant code for
'svglib.js' which is supposed to contain code for building the SVG
dynamically.
What this code is supposed to do is load the HTML page and execute the
anonymous script, and draw a navy blue-bordered yellow rectangle on a
blank page. This is similar to the example in the SVG 1.1 W3C
Recommendation on page 202 of the 719-page PDF.
I am getting an exception when embedSVG object placeInHTML() method is
called: NS_ERROR_DOM_HIERARCHY_REQUEST_ERR. I find in DOM Inspector in
spite of or after the exception that a document is placed as a child of
the object element, but it is HTML, with a default 'head', 'title',
'body' elements placed.
Where am I blowing it?
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May 25, 2011
I have written the following code to read contents of a text file using FileReader object of HTML 5 for Google Chrome.
<script>
function handle_files(files) {
var i;
if (checkBrowser("Chrome")) {
for (i = 0; i < files.length; i++) {
file = files[i];
var reader = new FileReader();
ret = [];
reader.onload = function (e) {
console.log(e.target.result)
}reader.onerror = function (stuff) {
console.log("error", stuff)
console.log(stuff.getMessage())
}text = reader.readAsText(file[i]);
alert(text);
}}}
</script>
<input type="file" multiple="multiple" onchange="handle_files(this.files)">
Unfortunately, the variable text always displays as undefined. Everything above the line text = reader.readAsText(file[0]); works fine. Is there any other solution to read a text file using HTML5/JavaScript on Chrome?
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Oct 31, 2011
I need a way to read the iframe url even when you navigate to a different page it will read again and keep tracking where the URL is on. Display the URL of the iFRame all the time how would I do this is it possible?
Javascript
HTML
PHP
Is used
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May 9, 2011
I am trying to cycle through a set of tables within divs this works fine in firefox, but I cannot understand why it is not working in webkit broswers an example of what I'd like to cycle through:[code]do I need to somehow define that 'roundabound' id is what i'd like to cycle through?
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Sep 2, 2010
im writing a .net mvc web app and in this step Id like to send a post back to my controller including date and time values that i have stored inside hidden fields on a form. where im getting confused (I am very new to java script) is how I can now read those values and add them to the URL I'm constructing
Code:
<asp:Content ID="Content2" ContentPlaceHolderID="Menu" runat="server">
<form id="form1" name="form1" action="WorkOrder" method="post">
<input type="hidden" id="time" name="time" />
[code]....
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May 11, 2010
Just wondering - is there some trick that allows this to be done of which I am not aware? Specifically, I would like to use XPath to query the _current_ HTML document in IE.
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Jul 16, 2010
I'm writing a script and I've encountered a problem.. I have a txt file with many words, each word in a different line. For example: the file words.txt contains:
word1
word2
word3
word4
word5
I need to load the content of the file into a variable in my script. I prefer that all the words will be in the same variable with line breaks, but if you'll figure out a way to put it in an array, it's ok too. I really don't know how to do it, and I tried to google but didn't understand.. By the way, I don't want to change the txt file to js file, I need it to remain txt..
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Jul 28, 2011
I want to change the content of different div's using .html(). The change should be done by clicking on the inner element of the container. The content of the clicked container should be changed with the first container. My problem is, that the following code does the change, but only once. After every div has changed one time, no more reaction is shown.
<script type="text/javascript">
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Apr 15, 2011
Is there a way to print (sending to printer) the partial contents within the HTML file
Ex: Can i print content of div2 only?.
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Apr 21, 2006
I am facing a certain problem when I try to add a content to a page dynamically and then save the page. I add a content dynamically to the page on a mouse click and then after the content appears in the screen, I try to save the HTML file from the browser. When I open the saved HTML file, I am not able to see the dynamically added text. This happens only in IE.
This is the code that I use.
"document.body.insertAdjacentHTML("beforeEnd", "<div id='idCanvas'> Sample Text </div>");"
This code successfully adds the new text to the page. But, when I try to save the page from "File -> Save As" and then open the saved file, I am not able to view that text. I need to get that text in the saved document as well.
I also tried using:
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Aug 20, 2010
I am writing a script that opens a popup, tries to access the document object in order to access the body object, and then find a DOM element in the child window.Seems simple enough, except that the window opens, and the document and body objects are NOT what they should be.The code for opening the child window (popup) is:
Code:
childWin = open("http://localhost/childDocument.html", ...);
childWinDocObj = childWin.document;
Here are just some of the properties of childWin.document relevant to this discussion:[code].....
And THAT is just how it is supposed to look.Which means that, by putting on the brakes of the execution of the script, the open() function works as expected: it opens the window and is supposed to load the document content specified by the URL in the first parameter!But not really: when the brakes are NOT put on the action of open() , it opens the window, and then delivers document and body objects that are NOT the content of the URL.
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Jun 25, 2009
This question may be simple, but I don't know how to do it. (I'm getting hava script error) I have 04 master pages and around 100s of ASPX pages. So when I want to work in some conent page where should I use my $(document).ready(function(). I already have used this in Master pages. [code]...
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Sep 15, 2009
Serverless situation where applet drives document scanner and captures images. Currently use data uri technique <img src="data:image/jpg;base64,BLAHBLAHBLAH> to dynamically change img src (image fed from the applet) when user wants to view a particular image.
Works great in firefox...In ie8, however, the 32K limit on data uri's stops me cold.
I researched switching over to MHTML techniques for IE only....but without server-side generation of the MHTML (or CSS), I am running into issues.
Does anyone know of a way to dynamically 'inject' MHTML content via javascript into current document for use as MHTML image ?
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Jan 15, 2011
I am writing some javascript that when the user clicks on a link, it hides or displays content inside a div tag. I have been trying to add some code that would only allow for one div tag to be displayed at a time.
Here is where I originally got the code [url]
Whenever I run this code I get this error:
This is the JavaScript that runs when the user clicks the link:
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