Not getting any errors in Aptana, so something I'm doing probably doesn't make sense. Basically, I am getting the value from a form and checking it against a regex. If the new checked variable isn't empty then I output to a different div that it is valid, and that it is not valid if the variable is empty.
<script type="text/javascript">
var age_regex=/(1[8-9]|2[0-9]|3[0-5])/;
var error_box= document.getElementById('error_box');
function checkAge(x){
var age = document.getElementById(x).value;
var checked_age = test.age_regex(age);
if (checked_age.value != "")
error_box.innerHTML = "Correct!";
else {
error_box.innerHTML = "Incorrect!";
}
}
</script>
Why regex for age ? How about this :
function checkAge(str) {
if(parseInt(str, 10) != str) {
return false;
}
if(parseInt(str, 10) < 18 || parseInt(str, 10) > 35)
{
return false;
}
}
Related
How can I find out if a text input is a certain text?
I tried this
<script>
var b = document.getElementById('button')
var u = document.getElementById('username')
var p = document.getElementById('password')
var bannedUsers = ["user1012"];
b.onclick = function() {
if(u.value.length <= 20 && p.value.length >= 6 && u.value.length >= 3 && !u.value === bannedUsers) {
location.href = "";
};
if(u.value.length > 20) {
return alert('Username needs to be below 20 characters.')
} else if(u.value.length < 3) {
return alert('Username needs to be above 2 characters')
}
if(p.value.length < 6) {
return alert('Password needs to be over 6 characters.')
}
if(u.value === bannedUsers) {
return alert('That username is banned.')
}
}
</script>
But it ended up just taking me to the page instead of saying "This username is banned"
You need to use the includes method.
bannedUsers.includes(u.value)
what you're doing right now is checking if the string is the array bannedUsers, translating to this: 'user1012' === '[object Object]'
You can use the Array.prototype.includes method to test if a given value is in an array. includes will return a boolean true or false.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
if (bannedUsers.includes(u.value) {
return alert('That username is banned.')
}
This is the code I wrote, it returns the alert every time even if the password is within the range(4-12).
function PasswordCheck() {
var str = document.getElementById("Password");
if (str > 4 && str < 12) {
return true;
} else {
alert("invalid password, your password needs to have 4-12 letters");
return false;
}
}
You need to retrieve the text in your element with value.
Then you want to check the length of your string with the length property of the str string.
function PasswordCheck() {
var str = document.getElementById("Password").value;
if (str.length > 4 && str.length < 12) {
return true;
} else {
alert("invalid password, your password needs to have 4-12 letters");
return false;
}
}
This is because getElementById returns an Element object and not the value directly.
I'm trying to create a script where I validate a phone number without too much regex in my scripts. So far I have:
var phone = document.PizzaForm.phone.value;
var num = [1,2,3,4,5,6,7,8,9,0];
var delim = ["(" , ")" , "-" , "."];
var incr = 0;
var status = 0;
if (document.PizzaForm.phone.value.substring() = num) {
incr++;
return;
}
if (incr < 10) {
var statustext=1;
alert("Phone data is missing.");
}
if (document.PizzaForm.phone.value.substring[0,4,8] != num || document.PizzaForm.phone.value.substring[0,4,8] != delim) {
(status var statustext=1;
alert("Phone data is incorrect.");)
}
if (statustext == 0) {
return true;
}
else {
return false;
}
}
but it's not working. I'm trying to increment my incr everytime there is a number so if incr < 10, i get a message that there aren't enough numbers. Anyone see where I might be going wrong?
In your below if condition :
if (document.PizzaForm.phone.value.substring[0,4,8] != num || document.PizzaForm.phone.value.substring[0,4,8] != delim) {
(status var statustext=1;
alert("Phone data is incorrect.");)
}
Declare your statustext set globally. Not inside the if condition.
status set to 1 directly.
change your logic as below
var statustext = 0;
if (document.PizzaForm.phone.value.substring[0,4,8] != num || document.PizzaForm.phone.value.substring[0,4,8] != delim) {
status = 1;
statustext = 1;
alert("Phone data is incorrect.");)
}
I'm currently using JavaScript code to validate a text field when the user types in letters a-z.
The script shows a tick if this is valid and a cross if its not. Now I am trying to add to the code to say check that the letters meet a minimum length of at least 4 characters, and if the min characters is met then show the tick and if the text is under the min character length show the cross.
How can I adjust my script to check the minimum length of the characters entered? Also can someone show me how I can allow '-' to be allowed in my validation?
script:
<script>
function validateCname(CnameField){
var reg = /^[A-Za-z]+$/;
if (reg.test(CnameField.value) == false)
{
document.getElementById("emailTick").style.display='none'; // Hide tick if validation Fails
document.getElementById("emailCross").style.display='block';
return false;
}
if (reg.test(CnameField.value) == true)
document.getElementById("emailCross").style.display='none';
document.getElementById("emailTick").style.display='block';
return true;
}
</script>
tried:
<script>
function validateCname(CnameField){
var reg = /^[A-Za-z]+$/;
var len = {min:4,max:60};
if (reg.test(CnameField.value) == false)
if(input.value.length>!=len.min) return flase;
{
document.getElementById("emailTick").style.display='none'; // Hide tick if validation Fails
document.getElementById("emailCross").style.display='block';
return false;
}
if (reg.test(CnameField.value) == true)
document.getElementById("emailCross").style.display='none';
document.getElementById("emailTick").style.display='block';
return true;
}
</script>
Almost there but you have a few syntax issues, so I've created an example test script for you:
function validateValue(value) {
var reg = /^[A-Za-z]+$/g;
var len = {min:4,max:60};
if (!reg.test(value)) {
console.log('didn\'t match regex');
return false;
}
if (value.length < len.min || value.length > len.max) {
console.log('incorrect length: ' + value);
return false;
}
console.log('correct length: ' + value);
return true;
}
validateValue('teststring');
Notice how I have set up the regex test, removing the == false? It's not needed because either false or array is returned. A true test will return true if anything other than null or false is returned.
Try this
<script>
function validateCname(CnameField){
var reg = /^[A-Za-z]+$/;
var len = {min:4,max:60};
if (reg.test(CnameField.value) == false) {
if(input.value.length<len.min)
{
document.getElementById("emailTick").style.display='none'; // Hide tick if validation Fails
document.getElementById("emailCross").style.display='block';
return false;
}
return false;
}
if (reg.test(CnameField.value) == true)
document.getElementById("emailCross").style.display='none';
document.getElementById("emailTick").style.display='block';
return true;
}
</script>
const validateCname = value => value.length < 4 ? `success message` : `error message`
function validateCname(value1)
{
var k = value1;
if(k.length<4){
//Your code if length is less than 4
}else{
//Your code if length is more than 4
}
}
I have a function for validating telephone and mobile numbers. Here is part of my function:
function IsPhone(){
var mob = /09[123]\d{8}$/;
var phn = /0\d{10}$/;
for (var i = 0; i < edit_rows.length; i++) {
if (edit_types[i] == 5) {
var phon_val = document.getElementById('phone1').value;
if (phon_val != "") {
if (phon_val.match(mob))
return true;
else if (phon_val.match(phn)) {
if ((phon_val).length == 11)
return true;
}
else {
msg_req += "Invalid format";
return false;
}
}
}
}
return true;
}
But it accepts all of these:
009153842716
09153842716
001234567890
01234567890
what can I do?
I think adding a ^ at the beginning of your expression would fix it. Your current query would match strings like 'thisisaninvalidvalue09153842716'. Adding the ^ makes sure you don't start with invalid input.