.getElementById (Multiple Elements?) Detect Whether The Input Value IsNaN?
Jul 27, 2010
I'm performing some validation functions on a form I've created.For the phone number, I have 3 text boxes lined up next to one another. The first is for the country code, the second is for area code and the third is for the remainder of the phone number.I have used the following in order to detect whether the input value isNaN.
Code:
input = document.getElementById("phone1");
if (isNaN(input.value)) {
errorText += "[code]...
As I have three text boxes for the phone number, can I group them within this one statement? So, ...getElementById("phone1, phone2, phone3"); ?If not, what would you recommend?
I'm trying to get the value of a selected option value. I've tried using getElementById("fieldname").selectedIndex.value and formname.elements["fieldname"].options[selectedIndex].value with no joy.
I have a 'confirm' form that hides a table when a certain field contains a null value.I actually need 3 fields to be null in order for the table not to show rather than one.here part of the working code.
Code: if (document.getElementById('FIELDNAME').value=='') { document.getElementById('ID_OF_TABLE').style.display='none'; }
How or what do i do to allow for 3 (or multiple) fields?This is doing my Head in.I know getElementById is most likely not the way to go as it only allows for one.
<html> <head> <script type="text/javascript"> function convertHaH() { var mylist=Number(document.getElementById("percent")) document.getElementById("remainder").value=100-mylist.value; } </script> </head> <body> <form> First percentage: <input type="text" id="percent" onchange="convertHaH()"> <p>Remaining percent: <input type="text" id="remainder" size="20"></p> </form> </body>
This code works great, it will populate the second box. But I would like it to check if what was entered is a number if it isn't then an alert box shows stating they need to enter a number between 1 - 100, else it populates the second box.
The code works, but it obviously can't be used for more than one picture per page because getElementById finds the first div and always displays it onmouseover of any attempted mouseover text.The Javascript in <head> is
<script type="text/javascript"> // Pop up code begin function ShowPopup(hoveritem)
I just want to be able to have more than one instance on each page and still be able to declare the image url in the body and not within the javascript.
For some reason getElementById continues to tell me that it had grabbed a null value despite any value I input. I am using firefox 3.6.8. Am I doing something wrong here?
I am actually learning Javascript atm as part of a course I am studying. I am wanting to do some validation for a form I have created. It doesn't validate for non-numeric characters like I want to do and it does not display the end result either.
I am trying to use multiple instances of this little show/hide script for a definition list on the same page. However, the problem is that the definition list must be given an ID, and this can only be used once on a page. [URL]. How would I go about changing this to a class so that I could use it more than once on a page (i.e. multiple definition lists as opposed to one big one)? I changed all of the getElementById to getElementByClass and it didn't seem to work.
I am having difficulty with the isNaN built-in function. Here is the code that I have written, with the event handler onchange, the function does not return the desired response.
CODE:
Here is an example of the event handler code...one of three calls to this specific function...
I am using jquery with the cookie plugin and I have multiple image buttons that can hide/show multiple elements. My question is how can I add a cookie to this code to remember whether each separate element is opened or closed?
The code, $(document).ready(function() { // choose text for the show/hide link - can contain HTML (e.g. an image) var showText='<div class="expanddown"></div>'; var hideText='<div class="expandup"></div>'; // initialise the visibility check var is_visible = false; // append show/hide links to the element directly preceding the element with a class of "toggle" $('.toggle').prev().append('<a href="#" class="togglelink">'+hideText+'</a>'); // capture clicks on the toggle links $('a.togglelink').click(function() { // switch visibility is_visible = !is_visible; // change the link depending on whether the element is shown or hidden $(this).html( (!is_visible) ? hideText : showText); // toggle the display - uncomment the next line for a basic "accordion" style //$('.toggle').hide();$('a.toggleLink').html(showText); $(this).parent().next('.toggle').slideToggle('fast'); // return false so any link destination is not followed return false; }); }); HTML, <a class="togglelink" href="#"></a> <div class="toggle"> Content </div>
I have a draggable marker on my page that sets the value of a javascript variable when the marker is released.I want to submit this value to store it in a database however I cannot figure out how to pass this javascript variable as a hidden form field.Here is my code. I suspect this is completelyhow to make this "lat" value available to me after the form has been submitted.
I'm not a JS expert, but is there any way to detect if there is a certain character at the ending of a sentence in a text input field?
for example, when a user puts "Hello, my name is Gary" into a certain text input with a specific ID and using the JS OnChange event, the script will add a period ( . ) if it is not detected.
or, when a period is detected at the end of the sentence ("Hello, my name is Gary."), it won't do anything.
I got this idea from reading the W3 School onchange doc, but I'm not sure if it's possible.
I want to detect input language of client. so i tried in java script with(navigator)it dosent work for my perpose i also used ( HTTP_ACCEPT_LANGUAGE) it return system language not keyboard language?
I know this does not work, but hopefully you can see what I am trying to do. Only the first value is tested, but I want all of them to be.
[Code]...
Pretend there are like 10 more cases with more numbers with them. Currently this will only text to see if x is 0 or 42. How do I get it to test for the other numbers?
I got a textarea and I need to detect instantly if user input is a chinese character or not. View this message in context: [URL] Sent from the jQuery General Discussion mailing list archive at [URL].
I having been trying to make the data from generated (using div tags) pairs of textboxes into two separate arrays, a[] and b[]. I thought that if I label each text box pair a[i] and b[i] that would be enough to include the respective element in each array but that hasn't seemed to work. In fact. the only way I managed to retrieve the values from the text boxes was using "getElementById" and resorted to a for loop in order to make the arrays but that method appears to be able to get elements from only one pair of text boxes. Code:
I want to restrict getElementById to search children of a specific element instead of searching the entire document, in the same way that I can do getElementsByTagName using a specific element as the parent.
In this particular instance the parent is a table and the elements I'm interested in are all TDs, so I did the basic getElementsByTagName('TD') off the table and looped through this array checking the IDs. However, I'm suspecting that the browser can do getElementById faster than I can do a loop in javascript. Is there a neater way to do this? For now, I'll settle for IE-only solutions, though it would be nice to have things work in generic browsers.
I am doing a form for my site and would like to enable and disable a radio button set depending on whether one of the choices on an outer radio button set is checked. How can I refer to all the inputs of the inner radio button set (they all share a common name) with javascript. I tried document.getElementsByNames('thename') but it doesn't work. I know this is because this method returns an array which you must then refer to by a specific index number, unless there is another way. I would like to refer to all of them at once and then set their disabled status to false.
I have a dynamically generated page (PHP), which contains an Explorer like view of items. I would like to hide multiple <tr>'s by name, but I can't figure out how thats done.
I have this code to hide one element by id
if (document.getElementById(id)){ document.getElementById(id).style.position = 'relative' document.getElementById(id).style.display = 'none' }
Anyone has a cod sample for looping through multiple elements and hide them?
