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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Aug 31, 2010
Why my email field is validating, but mycode for validating empty fields is not?
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I am using a validating form plug in for jquery and I have a question about it. Let this function will be an ex.:
[Code]....
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Aug 24, 2006
I have the following HTML code which is doing a GET to a page, say
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<body>
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</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
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function Clicked(MyControl)
{
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Sep 25, 2006
Is there any possibility to check the existence of XML?
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Jul 20, 2005
Suppose I have global variables: x1, x2, x3
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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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Jul 20, 2005
Is it possible to check for the existence of an element? I have a dynamic
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blah = getElementById("thumbnails");
Generates an error.... I was hoping it would just return false or
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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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Apr 13, 2010
I have the following code:
Code:
<script language="javascript">
<!--
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[Code].....
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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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Sep 22, 2011
I need to check the whether an external url like http://www.somesite.com exists or not using javascript.
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function checkUrl(url) {
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[Code]...
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Mar 26, 2006
I am using Javascript to add rows to tables, etc. in a function I am
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The problem is I need to test for the existence of the table - and if
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PLEASE REMEMBER - I don't know the name of the variable or object I am
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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:
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[doing stuff with the form field here]
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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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Oct 5, 2005
I'm trying to write a function to determine whether or not an image exists.
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Below are several examples of things I've tried so far:
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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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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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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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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]....
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Jul 23, 2005
I have a function like this
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} //End of function
This check if quantitiy is integer. In the form I have following
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I am a newbie to javascript.
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Jan 12, 2006
I have a form generated from a Perl script. The number of check boxes
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Jul 20, 2005
Can anyone explain why this code fails when the set of checkboxes
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myForm.update.length returns 0 instead of 1 with the result that
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if(myForm.update[i].checked == true)
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Jul 20, 2005
I have a requirement whereby I must validate that a string matches one of
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2. An ISO standard 2 character country code (eg GB, NL) followed by an X
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3. 3 characters in the range a-z followed by 3 digits followed by 2
characters in a specific set (eg MT, AT, DA).
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5. 4 characters followed by a hash (#) followed by 3 characters followed by
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I have been told that a better way to achieve this than using .charAt is by
using something called a regular expression, but I don't really understand
them. Can anyone please advise on the above or alternatively point me in
the direction of a suitable resource on these regular expression things?
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Aug 31, 2009
I am trying to write a js that validates a form with two text inputs. The two inputs are: 'D_techA' and 'D_techB'. I just want to add up (sum) the two input fields (which must be positive numbers) and make sure that they add up to exactly 100 (not more and not less). If they do not add up to 100, then an alert should pop up that says "The two values must add up to exactly 100." I have tried and tried to write a js that does this validation (looking at numerous validation scripts posted in this forum and elsewhere) and I just cannot seem to make it work.
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
<body>
[Code]...
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Feb 17, 2010
I am validating a page (image attached) to make sure that total hours entered do not exceed the allocated amount, which is stored in the database. I have already validated to make sure that they enter a number and that it is not greater than 8.
var returncode = true
var inputs = document.getElementsByTagName("INPUT")
for(var x=0; x<inputs.length; x++)
{
[Code].....
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Dec 3, 2006
How can I combine these 2 functions?
function POvalidator()
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obj.PONumber.focus();
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}}
function checkCheckBox(){
if (f.agree.checked == false )
{
alert("Tou must agree to the Terms to continue");
return false;
}else
return true;
}
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