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.
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]....
'e' is the name attribute of one form element, but can I choose more elements using jquery (CSS) rules like this: input[name*=e] or how can I do something similar?
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.
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?
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.
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:
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.
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:
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.
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.
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.
The problem is when i will calculate if quantitiy/buyquantitiy is an integer. The reason is that some products can only be seld as 4 items, and if you press 3 wou should get a message that says "Sorry a quantity of 3 are not aviable because there are 4 items in package". Can transfer 2 varibales into the function? Or have anyone any suggestion how to solve this.
I am a newbie to javascript. I have an asp text box which I want to validate for the number of characters entered i.e. I dont want user to enter more than 280 characters in the text box.
I have a form generated from a Perl script. The number of check boxes on the form is unknown until the time the form is generated. The names of the check boxes are created from some values in the database, based upon other user input.......<crazy, I know>
The user must choose at least one check box.
So, how can I write a javascript routine that will perform checking on an unknown number of check boxes.
Can anyone explain why this code fails when the set of checkboxes consists of only one.
myForm.update.length returns 0 instead of 1 with the result that I get an alert box even tho' the one checkbox is checked.
function checkForm(myForm) { var numBoxes = 1*myForm.update.length || 0; for(i=0;i<numBoxes;i++) { if(myForm.update[i].checked == true) return true; } alert("Select one or more part components to update"); return false; }}
I have a requirement whereby I must validate that a string matches one of several patterns:
1. An ISO standard 2 character country code (eg GB, NL) followed by five digits.
2. An ISO standard 2 character country code (eg GB, NL) followed by an X followed by five digits.
3. 3 characters in the range a-z followed by 3 digits followed by 2 characters in a specific set (eg MT, AT, DA).
4. 4 characters followed by a hash (#) followed by 3 characters followed by 3 digits followed by a hash followed by 3 characters.
5. 4 characters followed by a hash (#) followed by 3 characters followed by 3 digits followed by a hash followed by 4 characters.
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?
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.
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++) {
function POvalidator() { var obj = document.Form1; if (obj.PONumber.value == "") { alert("Please enter a value for the PO Number field."); obj.PONumber.focus(); return false; }}
function checkCheckBox(){ if (f.agree.checked == false ) { alert("Tou must agree to the Terms to continue"); return false; }else return true; }
