Develop Reference

How do i make a js code that redirects to a certain html page with a certain input?

let me explain this better, i would like to know how it's possible to create a js code that checks if an html input is correct and in case it is it redirects you to another page, here is what i tried based on what i managed to find out.
html part:
<form name="access" onsubmit="return validate()">
<input
type="text"
id="inputbox"
value="Password"
pattern="idkwhatishoouldwriteinhere"
/>
<input type="submit" value="Submit" />
</form>
js part:
function validate() {
if (document.access.Password.value != "idkwhatishoouldwriteinhere") {
alert("Wrong password");
document.access.Password.focus();
return false;
} else {
window.open("index.html");
}
}
in case you are wondering why i put the "answer" in the patter is because this is supposed to be a little easter egg and i feel like looking directly at the js is meaningless becuase it contains the link you should be redirected to.
enter code here

You need to give your input the name Password, otherwise document.access.Password is undefined.
function validate() {
if (document.access.Password.value != "idkwhatishoouldwriteinhere") {
alert("Wrong password");
document.access.Password.focus();
return false;
} else {
window.open("index.html")
}
}
<form name="access" onsubmit="return validate()">
<input type="text" id="inputbox" value="Password" name="Password" />
<input type="submit" value="Submit" />
</form>
<!-- password is "idkwhatishoouldwriteinhere" -->

You want this.
You had some issues with the id of the field and name etc
I also changed your inline code to eventListener which is the recommended method
Password is fred
window.addEventListener("load", function() {
document.getElementById("access").addEventListener("submit", function(e) {
const inputbox = document.getElementById("inputbox");
if (inputbox.value != "fred") {
alert("Wrong password");
inputbox.focus();
e.preventDefault(); // cancel submit
} else location.replace("index.html")
});
})
<form id="access">
<input type="password" id="inputbox" value="" placeholder="Password" />
<input type="submit" value="Submit" />
</form>

If you want to keep your code close to what you already have, I would adjust it like this. I would suggest storing your class names and ids as variables and then accessing them from the variable. Also there is no need to return false in your if. There are other good solutions on here but this one will keep your code pretty close. This will also ensure that you don't end up with a null value when accessing the value in your password field.
const passwordField = document.getElementById('inputbox');
function validate() {
if(passwordField.value != "idkwhatishoouldwriteinhere") {
alert( "Wrong password" );
passwordField.focus() ;
}
else {
window.open("index.html")
}
}
<form name="access" onsubmit="validate()" href="javascript:void(0)">
<input type="text" id="inputbox" value="Password" />
<input type="submit" value="Submit" />
</form>

enable/disable submit button based in input field (filled/not filled)

what I am missing in this code, If I just want the input submit button to enable/disable/enable.. as long as I fill or unfill the input text?
sorry I am doing my best to learn javascript...can anyone help me fix this code?
<form name="myform" method="post">
<input onkeyup="checkFormsValidity();" id="input_id" type="text" name="input_name" value=""/>
<input type="submit" name="submit_name" value="OK" class="submit_class" id="SubmitButton"/>
</form>
<script>
var sbmtBtn = document.getElementById("SubmitButton");
sbmtBtn.disabled = true;
function checkFormsValidity(){
var myforms = document.forms["myform"];
if (myforms.checkValidity()) {
sbmtBtn.disabled = false;
} else {
sbmtBtn.disabled = true;
}
}
</script>
This is the fiddle: https://jsfiddle.net/1zfm6uck/
Am I missing declaring onLoad mode or something like this?
Thanks!

Actually - if it wasn't a jsfiddle example your code would work great:
var sbmtBtn = document.getElementById("SubmitButton");
sbmtBtn.disabled = true;
function checkFormsValidity(){
var myforms = document.forms["myform"];
if (myforms.checkValidity()) {
sbmtBtn.disabled = false;
} else {
sbmtBtn.disabled = true;
}
}
input[type='submit']:disabled{
color:red;
}
<form name="myform" method="post">
<input onkeyup="checkFormsValidity();" id="input_id" type="text" name="input_name" value="" required="required" />
<input type="submit" name="submit_name" value="OK" class="submit_class" id="SubmitButton"/>
</form>
The problem was the jsfiddle put your javascript code inside a clousure, so the checkFormsValidity function is not available in the scope of your input.
I added a required="required" to your input to make sure it's a required field (which will affect the checkValidity() of your form).

function checkFormsValidity(){
needs to be change to:
checkFormsValidity = function(){
Personally I wouldn't check validity that way, but in terms of making your code work without error, that will do it.
Edit: Also add required="required" to the input.

is('checked') filtering method not working correctly

I am trying to see if a checkbox got checked with is() method, but it is giving an unexpected result. Either way if I check the checkbox or not, the method is returning false.
HTML
<form action="" method="post" id="place_order">
<input type="checkbox" name="tos" class="required check-condition" />
<span class="error error-tos" style="display:none">* This field is required</span><br>
<input type="submit" name="place_order" value="Submit Order" class="order-sb-btn" />
</form>
Jquery
$("#place_order").submit(function () {
var is_tos_checked = $(".check-condition").is('checked');
console.log(is_tos_checked);
if (is_tos_checked) {
$(".error-tos").hide();
return true;
} else {
$(".error-tos").show();
return false;
}
});
Jsfiddle
http://jsfiddle.net/yogc5ypb/1/

You need to express checked as a pseudo-selector, i.e. prefixed with :
.is(':checked');

I usually use .prop('checked')
So in your code you would change your line to:
var is_tos_checked = $(".check-condition").prop('checked');

If you want to submit form if user checked check box then you can use following method also-
1.write following statement in html file
<form action="" method="post" id="place_order">
<input type="checkbox" name="tos" class="required check-condition" />
<span class="error error-tos" style="display:none">* This field is required</span><br>
<input type="submit" name="place_order" value="Submit Order" class="order-sb-btn" />
</form>
2.Write following statement in js file.
jQuery('.order-sb-btn').click(function(){
var checkedValue = $('.required:checked').val();
if(checkedValue == undefined)
{
alert('not checked');
return false;
}
else
{
alert('checked');
}
})
By using above code form will be submit if user check the checkbox.
To check example please refer following link-
http://jsfiddle.net/1eygh774/1/

Javascript won't stop php form submission

Javascript gives error window, but it won't stop the form submission. I'm stumped at this point and can't find an exact answer. Here is the code, thanks:
function newNameValidate() {
var x = document.forms["checkIn"]["newName"].value;
if (x==null || x=="") {
alert("Tech name must be filled out");
return false;
}
return true;
}
Here is the HTML:
<form name="checkIn" onsubmit="newNameValidate(checkIn)" action="check_in_complete.php" method="POST">
<input type ="submit" class="input" value="CHECK IN">

You must return the value of the function, onclick="return foo();"

As others have said, you need to return the value returned from the function, but a better option is to use unobtrusive JavaScript:
<form name="checkIn" action="check_in_complete.php" method="POST">
Script:
window.onload = function() {
document.forms["checkIn"].onsubmit = newNameValidate;
}

It can be done like:
<form name="checkIn" id="checkIn" action="check_in_complete.php" method="POST">
<input type ="button" class="input" value="CHECK IN" onclick="newNameValidate()">
</form>
<script>
function newNameValidate() {
var x = document.forms["checkIn"]["newName"].value;
if (x==null || x=="") {
alert("Tech name must be filled out");
return false;
}else{
checkIn.submit();
}
}
</script>

Javascript form validation not working

I can't understand why my javascript isn't working... Do i need to declare a variable somewhere?
<script type="text/javascript">
function validation(form) {
      
if(form.first_name.value == '' ) {

alert('Please enter your first name');
 form.first_name.focus();
return false;
}
if(form.00N30000006S4uq.value == '') {

alert('Please enter the high end of your budget');
 form.company.focus();
return false;
}
return true;
}
</script>
<form action="https://www.salesforce.com/servlet/servlet.WebToLead" method="POST" onsubmit="return validation(this);">

As mentioned by #ReturnTrue, the NAME must begin with a letter. That is why your script is failing.
In your case since the field is auto-generated, if you know the flow of the elements in the form then you can reference the form elements array, like this...
form.elements[2].value
where form.elements[2] is form.00N30000006S4uq. That will do the job.
Example:
function validation(form) {
if(form.elements[0].value == '' ) {
alert('Please enter your first name');
form.first_name.focus();
return false;
}
if(form.elements[2].value == '') {
alert('Please enter the high end of your budget');
form.company.focus();
return false;
}
return true;
}
<form action="" method="POST" onSubmit="return validation(this);">
<input type="text" name="first_name" />
<input type="text" name="company" />
<input type="text" name="00N30000006S4uq" />
<input type="submit" name="submit" />
</form>

Form names need to begin with a letter. "00N30000006S4uq" fails because it begins with a number.
See: http://www.w3.org/TR/html401/types.html#type-cdata