GetElementsByTagName Not Returning Values?
Sep 1, 2011
My getElementsByTagName ("a"); is not returning anything. (well it's returning "0" not the value I should be getting) I'm asking it to find the number of links on my simple html page. (the reason I'm even doing this is just because I'm trying to learn javascript) but the console in Firefox and the Alert window are just returning "0" when it should tell me I have "4" right?
the files are both located in the same folder, locally
this is my scripts.js file
Code:
var linksAmount = document.getElementsByTagName("a");
alert("Amount of Links:",linksAmount.length);
console.log("Amount of Links:",linksAmount.length);
and this is my html file (it's very small)
[Code]....
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Mar 27, 2007
I am trying to turn all the bullet points Li id values so i can store them.. I have written the code below but all this does it return the number of li's, everything i have done to bring out the id of the li, it fails. Code:
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Mar 23, 2009
From the code given below, I think it's pretty obvious what problem I'm having, but I'll explain:
Javascript is only returning HTML DOM attribute values when they are assigned by the javascript function, not when they are assigned by CSS. So, if I set the background colour of a div using CSS, then try to call that attribute value, JS doesn't return it, BUT, if I then assign a new value using JS, it can correctly read the attribute value.
What am I doing wrong? Or can javascript not pull HTML DOM attribute values assigned by CSS?[code]...
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Aug 28, 2010
im having a problem with returning the value of a custom prompt box function . and stopping anything from happening while the prompt is open... the problem is with the
Code:
alert(prompt('please enter your name'))
at the end
Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<style type=text/css>
[Code]....
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Apr 6, 2006
I'm just starting to try out "Ajax" web programming and I've got a question.
AJAX is fairly straightforward. Javascript creates an XMLHttp object and
then uses that to generate a hidden webpage with your results.
What I'd like to know is, how can I retrieve multiple values from an XMLHttp
request?For example, if my request generated an SQL query that returned a
Name, Address and PhoneNumber, could I get those values directly instead of
parsing them out of the ResponseText?
This is my current handler:
function showResult(pge) {
var url="getResult.asp?sid=" + Math.random() + "&q=" + pge
xmlHttp=GetXmlHttpObject(stateChanged)
xmlHttp.open("GET", url , true)
xmlHttp.send(null)
}
function stateChanged() {
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
//Complete, so show results.
document.getElementById("myResult").innerHTML=xmlHttp.responseText;
//How to get mulitple values here?
}
}
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Jan 24, 2011
I want to open a aspx page as popup at a button click with some text box values being passed toit. Also need to display data in a grid in popup and then when a row is selected send that data back to parent .
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Jan 25, 2010
We use .mac's to create some of our Web content where we also use some javascripts. We have numerous prompts where we have a button for the user to click on that brings up a new prompt window where they type in a search name like, TIE, to search for all ties available to select from.
After typing the search name, the same window displays a list of selections to choose from. When they select the desired item and click the continue button, the window closes and we return the item number to the calling program.
What I would like to do is bring back more than one variable. For example, instead of just, 1234 in Fld1, I would like to return, 1234 into Fld1 and B into Fld2, where Fld2 will not be displayed but needed elsewhere.
For this made up example, these codes could stand for... 1234=Tie and B=Blue. We may use 1234 for all ties and have a second field to further define it.
The code I have always used in the past will just bring back the 1234, I am asking how to return the B also?
Here is some of the code I currently use:
This displays the button they click to bring up the pop-up search window...
<tr>
<th Align="Left" BgColor="LightSteelBlue">Item#</th>
<td colspan="3">
<input type="text" size="5" MaxLength="5" name="choiceItem" value="$(choiceItem)">
<input type=button onClick="window.open('/member/Item_Lookup_Both.mac
[Code]....
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May 27, 2011
I'm doing some jquery and ajax work with C# asp.net MVC on the server.
I have this JS function:
function DeleteListing(receiptItemId){
$.ajax({
url: "DeleteListing",
type: "POST",
[Code].....
What I'm wondering is there ways to return values from DeleteListing on the server to the success function?
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May 28, 2010
jquery width() and height() functions are consistently returning the wrong values for the viewport size (i.e. $(window).width). Anyone know why..or what I can do to fix it?
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Dec 13, 2007
I'm using height() and width() to find the dimensions of some inline images in the html. FF and IE work fine, but Opera is returning incorrect values. For example, it returns 92px as the width of an image that is actually 160px wide. How can I fix this?
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Jul 23, 2005
OK, so let's say, for example, I have a bit of HTML that looks like
this:
<td class="regular1b" valign="top">
<a href="notfound.html"><span class="list5"><b>Lecture
V</b></span></a>
</td>
And I want to save all the text ("all" meaning the tags and
everything) between the <td> and </td>. Using JavaScript, I was able
to isolate the <td></td> by doing:
var w = myTable.getElementsByTagName("TD");
So then I have an IF statement within a FOR loop that looks like:
if (w.item(i).className == "regular1b")
alert(w[i].childNodes[0].nodeValue);
The ALERT() is just a place holder to make sure things are working.
The thing is, nodeValue returns NULL because there's no actual text
within the <td></td> tags; the only thing there is more HTML code, and
the text between the <span></span> apparently isn't considered part of
the <td></td> tags.
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Jan 12, 2004
I'm using the getElementsByTagName method to obtain a customer listing of records. So far so good. However, I also want to reference the child nodes of the customer records.
ie.
<customer id="1234" name="Mr Dodd">
<purchase po="1" value="3.00"/>
<purchase po="2" value="4.00"/>
<purchase po="3" value="5.00"/>
</customer>
I used getElementsByTagName("customer") to obtain the list of customers, but I'm having trouble referencing the child nodes ie. purchase.
Does getElementsByTagName("customer") also obtain the child nodes, or only the matching element?
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Mar 30, 2009
I'm trying to run a script that runs in every browser except IE (IE 7) this is part of the script [code]...
On every other browser the alert(listLines.length) give me the number "16" that is the number of 'li' tags but in IE7 gives me [object] so as soon i get in the 'for' the scrip stop in IE.
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Jul 28, 2005
I've got the following line of code which works fine in IE ...
line_1_numbers [0] = document.getElementsByTagName
('table')[table_index].rows (0).cells (0).innerText;
But it Firefox, it barks saying:
"Error: document.getElementsByTagName("table")[table_index].rows is not a
function"
Any ideas what this means?
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Mar 19, 2007
I have some img tags in my HTML code, and I am trying to implement some manipulation on each image. Thing is, when using document.getElementsByTagName('img'), the JS engine skips every 2nd img tag, so I get an array with only half of the deal.
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Jun 30, 2006
Here's the deal, If I access the page directly on my pc via the file system (i.e. I open up the file via: file::/path../main.html, the page and script runs just fine.
If however I point the browser to tomcat i.e. localhost:8080/blah
firefox spits out the error: getElementsByTagName is not a function.
Any thoughts or pointers? I'm totally confused over this..this is a built in function call?
note: I did an instanceof on the object making the call, and it does indeed confirm it is an object.
ps. I have confirmed I can access the all scripts/css files from the webserver (tomcat)
System:
FireFox (1.5.04), Tomcat, IE6 (also fails, even though I haven't found out how to see the js error details?)
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Nov 10, 2011
I have only IE8 (and older versions) issue with reading Gpx xml.Here is JavascriptCode:
var xmlhttp;
if (window.XMLHttpRequest) { code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else { code for IE6, IE5
[Code]...
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Oct 28, 2009
I was looking at the documentation on this over at [url] and they have the following information:
Summary: Returns a list of elements with the given tag name. The subtree underneath the specified element is searched, excluding the element itself.
My question is this: what do they mean by "subtree?"
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Feb 27, 2006
Are there any ways to edit the html within an element without knowing the TagName?
I'm trying to add html code within a <td> element that has no name or ID. What I do know is that it's the third <td> element within the only <tr> in the table. Assume that none of the elements in the file have IDs or names. The html is produced by a compiled program, so I have no way of editing the HTML in order to add names or IDs. Code:
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Mar 29, 2011
I've been given an assignment to create an alert message everytime a link is clicked on a page. It can be 10 thousand links on the page. Doesn't matter. figure out what the javascript would be?I've tried this but it doesn't work.document.getElementsByTagName("a") = alert("hello");
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Feb 4, 2010
I use Google Chrome because of the Javascript debugger that comes included and I keep getting the following errors with my AJAX script
Code:
Uncaught TypeError: Cannot call method 'getElementsByTagName' of null option.html:23
Uncaught TypeError: Cannot call method 'getElementsByTagName' of null
option.html:40
[Code]....
What is supposed to happen is I press either button then it calls either getoptions1() or getoptions2() which then lists the options using listoption() Then the user selects a color and setoption() gets called. I'm having a problem with either getoption function or the listoption function.
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Feb 1, 2004
I'm working on developing an RSS/RDF/Atom Parser in JavaScript. I've already successfully implemented complete support for RSS 0.9x and 2.0. So far, so good. However, I've run into two minor problems. One is mentioned here, and one is in another post.
The issue that I'm coming across is the case-sensitivity of getElementsByTagName() when parsing standard RSS (XML) tags.
Danny Goodman's JavaScript Bible says that the tag name string that gets passed as the parameter in getElementsByTagName() is case-insensitive. However, this is speaking in terms of HTML and the HTML DOM. I'm working with XML, and getElementsByTagName is handling the XML tags as being case-sensitive.
Can someone suggest a way around this? Can a regular expression be used as the parameter? If so, what would the syntax be (as I'm not very familiar with regex)? For example, I want a <textinput> tag to be handled the same as <textInput> (which is the correct syntax).
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Jun 9, 2009
I'm trying to write code that will extract from an XML file and then display the results. Keep getting a syntax error.
HTML:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>[code]....
My intention was to access all of the tags (name, genre, and hitsong) in the XML file. Thought that var musicianInfo = xmlDoc.getElementsByTagName("*"); would do that. Then, loop through each tag and display the result.
Why isn't it working?
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Jul 15, 2011
I have an array of HTML tables created in PHP which I send as a XMLHttpResponse encoded with JSON. Is there was a way I could access the table elements which are now in the JSON Object?
Relevant bits:
PHP code:
$verificationListsResponse = array("classeList" => "$classeList", "workCodeList" => "$workCodeList");
$searchResponse['verificationLists'] = $verificationListsResponse;
print json_encode($searchResponse);
[Code]....
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Apr 22, 2009
I have a problem in FireFox when using "getElementsByTagName". eg x = xmlDoc.getElementsByTagName("lead_recipient")[0].childNodes[0].nodeValue;
I use this code in my setupPage() function below. It works fine in IE, but in FireFox I receive an 'undefined' error.
I have included a copy of my XML below.
================== Javascript ========================
type="text/javascript">
var xmlDoc;
function loadXML()
{
[Code].....
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Aug 11, 2010
I'm using getElementsByTagName() to retrieve some elements and do something with them. It works fine in FF but not in Chrome and Safari.
In Chrome it says: "Uncaught TypeError: Cannot call method 'getElementsByTagName' of null"
Here's the code:
Code:
function popUpSAPWindow(){
// Find all links in the page and put them into an array.
//Below is the line that gives me trouble
var linksInOrderLinesTable =
[Code]....
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