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Javascript validation breaks when submitting

I've been working on a simple form that will have several (2-3) sets of questions that contain radio buttons as answers. Each radio button has a number value. I was able to work in a logic that shows or hides a text box when the user selects a certain radio button.
In the original code I found, the validation checks only one specific question, but I'm wanting to update the validation code in a way that if ANY of the questions have a text box visible, and its empty, the alert pop up should come up.
Here is a JSFiddle page with the code: https://jsfiddle.net/nxenxoo/92myvwc3/25/
At this moment, if on question #1 I click on radio buttons 1-3, and forget to fill in the text box, move onto the second question and hit radio button 10, for example, the validation works great. I get a pop up.
However, lets say I fill in the text box required for question #1 and leave the text box that appears for question #2, then I get a 404 error upon submit.
I was trying to work in a OR statement || below, I was hoping it would work, but unfortunately it does not.
function validateForm(){
var x= $("form input[type=text]").val();
if ($('.showother' || '.showother2').is(":visible")) {
if ( x==null || x=="")
{
alert("Please fill in all text boxes");
return false;
I am curious to figure out what could be the problem. I know very little of javascript, so I am sorry if this is a very basic queston!

HTML
<div id="Other" class="showother" style="display:none">Please specify <input name="textbox" id="textbox" type="text">
</div>
...
<div id="Other2" class="showother2" style="display:none">Please specify <input name="textbox" id="textbox2" type="text">
</div>
Javascript
var x= $("form input[type=text]").val();
...
"form input[type=text]" matches both text inputs, but only returns the value of the first match.
function validateForm(){
var x1= $("#textbox").val(); // first textbox, use id
var x2= $("#textbox2").val(); // second textbox, use id
if ($('.showother' || '.showother2').is(":visible")) {
// check if either are null or empty
if ( x1==null || x1=="" || x2==null || x2=="") {
alert("Please fill in all text boxes");
return false;
}
}
}
Alternatively, check all visible text inputs with one block of code:
$("form input[type=text]").each(function() {
if (
($(this).parent().is(":visible"))
&& ($(this).val()==null || $(this).val()=="")
) {
alert("Please fill in all text boxes");
return false;
}
})

Check form with onclick() function not working properly

This is my third night working on the same code... can`t get it right after days of google and tutorials and I am so tired of it... I am beeing desperate right now...
On short, I have a form and I use a button type="button" to generate a second button type="submit".
Before the second button appears, I need to check all required inputs if empty and after completion, show the second button.
I created a mixed code which now verify if inputs are empty, and highlights them one by one, not all inputs empty at the same time as I wanted.
I wanted to show highlighted all empty inputs not one by one and if one input is filled it should remove highlight class.
My work so far can be found here: here
Most important of all, I have a calculator which is calculating from inputs values. This is the reason I am using first button type="button".
How to get this to an end? I am so tired of this. Thank you.
LE: Partially fixed it by removing some return false; code from function. It has some errors although. For example, if you complete the last three inputs without completing and the ones on top, will submit anyway.

You could use the required attribute. It won't have any effects as you're not submitting the form, but then you could select all required fields with document.querySelectorAll(":required") or with jQuery $(":required") and loop through all of them validating each one.

You are returning false when a value is empty, so it's stopping the function, that's why they highlight one by one.

You can look this basic validation using JS and get idea what to do
<script type="text/javascript">
function validateMe(){
var name = document.getElementById('name').value;
var phone = document.getElementById('phone').value;
if(name==""){
//do something
alert("name can not be null");
return false;
//this will not submit your form
}
else if(phone==""){
//do something
alert("phone can not be null");
return false;
//this will not submit your form
}
else{
return true;
//This will submit your form.
}
}
</script>
<form action="somewhere.php" method="post" onsubmit="return validateMe();" >
<input type="text" name="name" id="name" />
<input type="text" name="phone" id="phone" />
<input type="submit" value="check and submit" />
</form>
NOTE: This is very basic validation using Javascript. What you want is to click one button and if valid then show submit button. But why you want do that if you want only validation. Why two buttons one to check values and show submit button and another button is submit itself. Why?

I created another short loop function BUT after inputs are filled, newButton button does not show. All Inputs are turning green from empty red. Please see the positioning of the return false;
function validateForm() {
var elements = document.getElementsByClassName("form-calc");
for (var i = 0; i < elements.length; i++) {
if(elements[i].value == "") {
elements[i].style.borderColor = "red";
} else {
elements[i].style.borderColor = "green";
return false; // IF PUT THIS HERE, ONLY ONE INPUT AT A TIME IS HIGHLIGHTED BUT IN THE END THE newButton WILL POP UP.
}
}
return false; // iF I PUT THIS HERE IT STOPS HERE, NO NEWBUTTON NEXT.
var newButton = "<input type='submit' name='submit' value='Trimite-mi oferta pe mail' class='buton-calc'/>";
document.getElementById("a").innerHTML= "<span style='margin-left: 17%;'>Oferta personalizată a fost generată</span>"+newButton;
//SOME CODES HERE
});
What am I missing?

Radio button REQUIRED if input field has content

I have a a reasonably quick problem to solve (I think). I have a form online and it validates the required content for the user's data, but has no validation on the first part of the form.
I've been asked however if I can make a radio button REQUIRED depending on whether an input field has been filled in.
The form can be found here:
http://www.elcorteingles.pt/reservas/livros_escolares/form.asp
So if the person start's filling in the input fields on the first line, that the radio buttons in the group become REQUIRED (for either the CDROM ou CADERNO but not both)

You can handle the focusout and blur events for the input:
$(function () {
// Handle every input type text.
// To select specific inputs, give them a common class and change the
// selector accordingly.
$("input[type=text]").on("focusout blur", function () {
// Check for inputs with class radio_btns which are in
// the parent element (li).
// Set their required property.
$(this).parent().find("input.radio_btns")
.prop("required", $(this).val().trim().length > 0);
});
});
Demo
jQuery reference (Tree Traversal)
jQuery reference (.prop())
jQuery reference (.focusout())
jQuery reference (.blur())

This will work. You can include the following JQuery code in the script tag, and also the JQuery cdn link in the head tag.
$(document).ready(function(){
$('#01titulo').focusout(function(){
if ($(this).val() !== "") {
$('[name="01caderno"]').prop('required', true);
} else {
$('[name="01caderno"]').prop('required', false);
}
alert($('[name="01caderno"]').attr('required'));
});
});

Try using the following js code its working:
$(document).ready(function(){
$(".titulo_books").each(function(){
$(this).focus(function(){
var radioChecked=0;
var currElemId = parseInt($(this).attr('id'));
var radioSelecterId = (currElemId>9) ? currElemId : "0"+currElemId;
$("input:radio[name="+radioSelecterId+"caderno]").each(function(){
if(radioChecked==0)
{
radioChecked==1;
$(this).attr("checked","checked");
}
});
});
});
});
I have checked it by executing this from console on your site and it seems to work fine. You can alter this in the way you want. I have checked one of the four available radio button. User can change the input value if required. Or you can also change the default radio button selected through my code.

Check value fields that if the same empty value in last field?

I have several field that just get number, I want if user typed be identical value in two or more field empty value the last field that is identical by jQuery.keyup?
For Example:
<input name="num[]" value="11111">
<input name="num[]" value="33333">
<input name="num[]" value="11111"> // in this input should empty value it.
How can fix it?

$(function(){
$("input").blur(function(){
var _val = $(this).val();
var change = false;
$("input").each(function(){
if($(this).val() == _val){
if(change) $(this).val("");
else change = true;
}
})
})
})

What happens if I had 12345 in a box, then I went back to an earlier box and typed 123456? The 12345 would be cleared. I suggest:
Bind the check to onchange, NOT onkeyup.
Instead of clearing the value, change the background colour to red and disable the submit button.
Adjust Yorgo's code to achieve this end, because it seems to do what you asked.

How do I use jQuery to disable a form's submit button until every required field has been filled?

I have a form with multiple inputs, select boxes, and a textarea. I would like to have the submit button be disabled until all of the fields that I designate as required are filled with a value. And after they are all filled, should a field that WAS field get erased by the user, I would like the submit button to turn back to disabled again.
How can I accomplish this with jQuery?

Guess my first instinct would be to run a function whenever the user starts modifying any of the inputs. Something like this:
$('#submitBtn').prop('disabled', true);
$('.requiredInput').change(function() {
inspectAllInputFields();
});
We then would have a function that checks every input and if they're validated then enable the submit button...
function inspectAllInputFields(){
var count = 0;
$('.requiredInput').each(function(i){
if( $(this).val() === '') {
//show a warning?
count++;
}
if(count == 0){
$('#submitBtn').prop('disabled', false);
}else {
$('#submitBtn').prop('disabled', true);
}
});
}
You may also want to add a call to the inspect function on page-load that way if the input values are stored or your other code is populating the data it will still work correctly.
inspectAllInputFields();
Hope this helps,
~Matt

Here's something comprehensive, just because:
$(document).ready(function() {
$form = $('#formid'); // cache
$form.find(':input[type="submit"]').prop('disabled', true); // disable submit btn
$form.find(':input').change(function() { // monitor all inputs for changes
var disable = false;
$form.find(':input').not('[type="submit"]').each(function(i, el) { // test all inputs for values
if ($.trim(el.value) === '') {
disable = true; // disable submit if any of them are still blank
}
});
$form.find(':input[type="submit"]').prop('disabled', disable);
});
});
http://jsfiddle.net/mblase75/xtPhk/1/

Set the disabled attribute on the submit button. Like:
$('input:submit').attr('disabled', 'disabled');
And use the .change() event on your form fields.

Start with the button disabled (obviously). Bind an onkeyup event to each required text input, and an onchange or onclick to the select boxes (and any radio buttons/checkboxes), and when it fires, check whether all required inputs are filled. If so, enable the button. If not, disable it.
There is one loophole here, though. Users can delete the value of a text field without triggering the onkeyup event by using the mouse to "cut" the text out, or by holding down the delete/backspace key once they have deleted it all, and clicking the button before deleting it.
You can get around the second by either
disabling the button with onkeydown and checking if it is ok on onkeyup
checking for validity when the button is clicked

An idea from me:
Define a variable -with global scope- and add the value true- Write a submit function within your check the value above varibale. Evalue the the submit event only, if the value is true.
Write a function which ckecks all value from input fields and select fields. Checking the length of value to zero. if the value length of one field zero then change the value of the global variable to false.
After that, add to all input fields the event 'onKeydown' or 'onKeyUp' and to all select boxes the event 'onChange'.

I recommend taking a slightly different approach and using jquery's validation http://docs.jquery.com/Plugins/validation. The tactic you are suggesting is prone to security holes. The user could easily using firebug enable that button and then submit the form.
Using jquery validation is clean and it allows you to show error messages under the required fields if so desired on submit.