Possible To Check Existence Of XML?

Sep 25, 2006

Is there any possibility to check the existence of XML?

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How To Check URL Existence ?

Aug 24, 2006

I have the following HTML code which is doing a GET to a page, say
MyUrl.aspx :

<body>
<form name="form1" method="get" action="MyUrl.aspx" id="form1">
<input type="hidden" name="ClickedElement" id="Messenger" />
</form>
</body>

where the the Submit() is done within a javascript function invoked at
onclick on some element.

My question is: How can I prevent form submission when MyUrl.aspx is
not available? The javascript function is:

function Clicked(MyControl)
{
var _CellContent = document.getElementById("Messenger");
_CellContent.value = MyControl.id;
document.form1.submit();

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Check An External Url Existence?

Sep 22, 2011

I need to check the whether an external url like http://www.somesite.com exists or not using javascript.

I have a ajax method for it,

function checkUrl(url) {
var xmlhttp=false;
if (!xmlhttp && typeof XMLHttpRequest!='undefined') {

[Code]...

But is not successful for finding existence of external urls.

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Check For The Existence Of A Variable With A Calculated Name?

Jan 29, 2009

I'm processing a form with numbered fields, but I don't know how many fields there are. Might be 1, might be 20. So I'm iterating through 1-20 and trying the following test:

for(i=1; i<=20; i++) {
if(typeof(eval('document.edit_orderitem_form.field_'+i+'.value')) != 'undefined') {
[doing stuff with the form field here]
}
}

The script quits on that line with "Undefined value" showing up in Safari's error console. I just can't figure out how to eval() the name of a field when it may or may not exist.

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Pass Text From One Select Box To Another Select Box Using The For Loop To Check The Existence Of An Item But It Is Not Working?

Aug 28, 2010

i am trying to pass text from one select box to another select box. The logic is if 10 are added, no more passing must happen. Also if an item is already added, it mustn't be added again.I am using the for loop to check the existence of an item but it is not working: what am i doing wrong?

Code:
function PassSelectValues(){
//pass values from select boxes to select boxes
var counter;[code]....

why isn't counter incrementing at all? The alert message box does appear saying item exists but the item gets added anyway.

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Word Existence

Aug 23, 2001

How do I check if a certain word exists in a text box? For example, if I set the word to be found to "word1", if the text box is "This is word1", and alert would come up saying that "word1" was found.

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Validating Existence Of XML Tag ?

Apr 13, 2011

I am creating this Javascript/XML HTA that is basically a project tracker. I recently added some new fields in the form that are written to the XML file for the project being tracked. This makes the files neither backwards compatible if I use it in a previous version nor forward compatible for future versions. This means if a user is using version 1, I create version 2, he wants to import his old tasks to Version 2, it throws an error. For example if I have a <status> element written in the newest version, but no <status> in the previous, I can no longer use that projects XML file in a previous version.

I tried to use the following code to validate existence of the tag and assign whatever outcome as the variable to write, but it's not working. Theres a few different ways I tried.

1st Way:

Code:

2nd Way:

Code:

3rd Way:

Code:

Here's the XML file for reference.

Code:

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Existence Of Several Global Variables

Jul 20, 2005

Suppose I have global variables: x1, x2, x3
and I have a function that needs to assign a value to a new global variable
x4

something like
function foo ()
{
count = 0;
do {
count ++
varname = 'x'+ count
} while (globalExists (varname)

eval ( varname + ' = "I am new in the x-series" ' )
}

how would the function globalExists () be implemented ?

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Checking Existence Of An Element?

Jul 20, 2005

Is it possible to check for the existence of an element? I have a dynamic
page which may or may not have a <div> holding a bunch of thumbnails, and I
want a function to check for the existence of the <div>. Doing:

blah = getElementById("thumbnails");

Generates an error.... I was hoping it would just return false or
something... Is there a way of doing this?

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Toggle Not Just Visibility, But Existence?

Feb 19, 2009

I'd like to be able to toggle the existence of a DIV using the onclick attribute.

HTML Code:
<input type="radio" value="1" checked="checked"
onclick="document.getElementById('div').style.visibility='hidden';"> 1

[code]....

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Testing For Existence Of Element?

Apr 13, 2010

I have the following code:

Code:
<script language="javascript">
<!--
// Max number of items to show/hide

[Code].....

Which is designed to hide all but one of a group of DIVs with consecutive IDs in the form "listings_stations_<number>". The problem is, I won't know how many of these DIVS there will be. I know a maximum possible number though.

The script as-is works, but obviously throws up errors trying to get handles to non-existent elements/objects. How can I check an element exists before getting and setting style properties for it? I'd like a solution that works for all three browser-types the script currently works with.

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Test For Existence Of Dynamic Variable

Mar 26, 2006

I am using Javascript to add rows to tables, etc. in a function I am
calling. I pass the function the ID of the div, and what I want in the
rows, and it will add rows to a table in the div.

The problem is I need to test for the existence of the table - and if
the variable or object doesn't exist already my code errors -
PLEASE REMEMBER - I don't know the name of the variable or object I am
testing the existance for - it is created dynamically based on the
divID. So when I test for this object or variable the test has to be
for a dynamically created object - Code:

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Testing Image Existence With Side-effects

Oct 5, 2005

I'm trying to write a function to determine whether or not an image exists.

Most people recommend setting the onload event handler. That works like a
charm except that side-effective actions seem to be impossible. I can, as
nearly as I can tell, run alert and opera.postError (I test on IE, firefox,
and opera by the way). I've tried using the 'this' while in the event
handler, setting this.name, test.name, window.document.getElementById(test's
id).name. I just can't seem to find any means of using side effects inside
the event handler.

Below are several examples of things I've tried so far:

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JQuery :: Checking For The Existence Of An Appended Object?

Sep 27, 2011

Here's what I want to happen with the above: "if txComments is there don't append it again"owever when I run this code, it appends a new "txComments" every time the code is triggered.

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JQuery :: Checking For Existence Of A <td> Class Name In Dynamically Created Table?

Feb 27, 2010

checks my table (previously created by "click handler") "td" elements for not existance of a paticular class name.

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Disable/enable Submit Button Based On Existence Of Validation Errors?

May 1, 2010

Would anyone care to post your favorite script for disabling the submit button on a form when there are input errors, and reenabling when all errors are resolved? I'd be curious what the different approaches are to this. I looked through my various SitePoint javascript books and surprisingly didn't find an answer to this scenario specifically.The behavior I'm trying to achieve (most efficiently) is having a form start out with the submit button enabled, but if there is a validation error, such as a required field being left blank on blur, the submit button is disabled. It's easy then to re-enable it when the user fills in that field, but harder to get the script to check and see if there are any other lingering errors before going ahead and enabling it.

My natural inclination would be to just keep a count of errors that increments and decrements when errors occur and are resolved. Then the script would check to see that the error count is 0 before re-enabling the submit button. It seemed easy, but I think I'm getting mixed up somewhere in conflicts of variable scope, and it's not turning out right.A google search rendered an example where someone was using a string variable to store errors, concatenating and replacing data to the string as errors were logged/resolved.

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Function - Check On A Check Box Another Check Box Appears

Jan 28, 2009

I want a function that when you check on a check box another check box appears.

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JQuery :: Uncheck And Check (re-check) A Radio Input On Page Load?

Oct 4, 2011

Here is the HTML: [URL] I'm trying to uncheck the selected radio button, then set the value to 1 (Yes), basically overwriting theinitialvalue to 1. I've looked at prop(), val(), and attr(), and just don't know where to start. Should I select $('#set_q157 input') or$('#set_q157 input:radio'), or each individual radio?

Do I need to each them, and check if its checked, then change its value, or is there a way to select all three inputs as just one radial button? It would also need to work if the input has not yet been checked.

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How To Count Number Of Check Boxes In A Check Box List.

Mar 29, 2006

i have a list of checkboxes, the number of checkboxes is dynamic. All the checkboxes have same name. i am trying to get the length of selected checkboxes.

<input type=checkbox name=name1 value=1>
<input type=checkbox name=name1 value=2>
........ get dynamically.

when i try to get the length in javascript like document.form.name1.length, it works fine if number of checkboxes selected are more than 1, but not for 1.

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Auto Check Multiple Check Boxes Onclick ?

Mar 11, 2010

I have a code that I got from a tutorial website. The goal is when someone clicks the first check box with the value of yes then the two other sets of check boxes will autmatically be checked for no.

The issue is their are three sets of 2 check boxes each.

So here is my code code I am trying to use

PHP Code:

Here is my form code

PHP Code:

So Ideally when a representative clicks that the customer has three services (clicks the Yes checkbox) all the other checkboxes will default to No.

How I would change the above javascript to do this.

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Code To Check Quantity For Button, But It Will Not Check For Enter Key?

Nov 9, 2011

I am a php programmer and not a Javascript programmer and I am trying to help a friend out with his shopping cart. The original programmer (who wrote this years ago and is no longer around) has a button that looks up the quantities in the database for the submitted items, and then displays a prompt if you selected a quantity that is less than the minimum purchase amount.The issue is if the user enters a smaller amount than allowed and hits the enter key instead of the "Buy" button, it allows the order.how to use the current code to also check for an Enter key submission.I can handle the PHP and the db lookup for minimum quantities. Here is the page code and the Javascript code.

Code:
<a href="javascript:checkQuantity(document.form<?php echo $formCount; ?>,
<?php echo $row_rsProduct['lotQty']; ?>,

[code]....

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Check Before Posting The Form (including A Botdetect Check)?

Jul 18, 2009

I have an .asp page for my customers which does just accepts e-mail information and passes this information to another .asp page. But before passing the info, a javascript checks whether the entered e-mail does match some certain rules. Rule1: If any input has been made at all, Rule2: If an "@" sign is there, if the"." is there and so on. upon pressing the submit button, the first rule works but the second rule does not. Could not figure it out why.

[Code]...

It is the function control() which validates the e-mail field. But it just validates whether the e-mail has been entered or not. The second check (with the @ sign) is not being made.

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Check If Check Box Is Checked On Name Array?

Apr 19, 2010

I'm working a bunch of pre existing code on a CMS. Just after a quick fix. Doing a show/hide thing on a particular div somewhere on the page depending if a checkbox is ticked or not.Currently there is 3 checkboxes that are dynamically added through the CMS. Here's simplified version of the form:

<form id="simplesearch" name="simplesearch">
<input type="checkbox" onclick='showhidefield(this.value)' name="meta_data_array_search_criteria[custom_profile_type][]" value="5" class="input-

[code]....

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Check If Checkbox Check Dynamically?

Sep 27, 2009

<input type="checkbox" id="priority" /><span class="presult">0 USD</span>

I want when checkbox is checked, the span will have 500 USD. When checkbox is unchecked the span will return 0.This is what I've got, have no idea why not work.

Code JavaScript:
if ($('#priority').is(':checked')) {
$('.presult').text('500 USD');

[code]......

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Check To See If Check Box Is Checked?

Oct 21, 2010

i need to check to see if my check box is checked, here is my code...

echo "<form id='form1' name='form1' method='post' action='".$href."' onsubmit='return checked_room()'>";
while($row = mysql_fetch_assoc($res))
{

[Code]....

now for some reason i can't get the javascript to work within the function.

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Select Max 2 Check Box From 10 Check Box?

Jun 5, 2010

How can i select max 2 check box from 10 check box.following code i used for check box

PHP Code:
<input type='checkbox' name='r1[]'  value="<?php echo $bno;?>"?>>

What code can be design in JS

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