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Regular expression is not working for numbers in jsp java

what I want is If the enter text box value is in format or not (1-10 number hyphen number) i did this for one pattern matching /^[\d]+([-][\d]+)?$/g but it allows only 0-9(single digits) i not taking 11-20(double digits) I need to allow any type digits like 10-11 and how can i do this
var txt = document.getElementById("txtShareCount").value;
if(txt.match(/^[\d]+([-][\d]+)?$/g)){
return true;
}
else if(!txt.match( /^[\d]+([-][\d]+)?$/g)){
alert("Pleae Enter Share count this(1-10) format");
document.getElementById("txtShareCount").focus();
return false;
}
else{return true;}

Here i'm posting the OP post as executable snippet to show his code is working perfect . i said in comment he didn't accept that . so only i'm posting this snippet .
1) Additionally i applied only trim()
$('#ss').click(function(){
var txt = $("#txtShareCount").val();
if(txt.trim().match(/^[\d]+([-][\d]+)?$/g)){
alert("hi valid format ");
}
else if(!txt.trim().match(/^[\d]+([-][\d]+)?$/g)){
alert("Pleae Enter Share count this(1-10) format");
$("#txtShareCount").focus();
return false;
}
else{
alert("hi valid format ");
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="inputt"><input type="text" id="txtShareCount" name="myanswer" class="myinput"></div>
<input type="button" id="ss" value="submit" >

The regex ^[\d]+([-][\d]+)?$ accomplishes what you need

Create a guestbook application in HTML with some conditions in the input fields

I want to create a guestbook application page in HTML which has 3 fields for the user to input:
Name
E-mail
Message
I wanna make the client check in JavaScript, so below are my snippets of code which I added in the head of the html page.
For the Name I need to put a condition so only letters can be entered, no numbers, no special characters, no spaces or empty field, so I made this
function Validate()
{
var x=document.forms["guest"]["email"].value;
var y=document.forms["guest"]["name"].value;
var regex=/^[a-zA-Z]+$/;
if( y==null || y=="" || (!y.match(regex)))
{
alert("Please enter your Name! ");
return false;
}
My question is: How can I insert a condition so the name must be bigger than 3 letters?
For the e-mail field I made this:
if(x==null || x=="")
{
alert("Please enter your email address!");
return false;
}
var atpos=x.indexOf("#");
var dotpos=x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
{
alert("Not a valid e-mail address");
return false;
}
else
return true;
}
Here I don`t have any question.
For the message field I need to add a condition so the message must be bigger than 10 characters.
Can you help me with that?
Thanks

You really dont even need javascript for this:
<form action="">
<input type="email" pattern="[a-z0-9._%+-]+#[a-z0-9.-]+\.[a-z]{2,4}$" name="email" required title="Valid email required" required>
<br>
<input type="text" pattern="[a-zA-Z]{3,}" name="name" required title="Letters only and at least 4 characters" required>
<br>
<input type="text" pattern=".{10,}" name="message" required title="10 characters minimum" required>
<br>
<button>Submit</button>
</form>

You should take a look into the length property.
E.g.:
var y=document.forms["guest"]["name"].value;
if(y.length < 3) {
alert("Not a valid name");
return false;
}
Further informations for the length property on w3schools
An other option is to use the HTML5 minlength attribute:
<label>Username: <input name=u required minlength=3></label>
Further informations for the minlength attribute on W3

javascript validation numerical

Hi sorry i'm still pretty new to javascript.
I've developed a form in HTML and now i'm attempting to add javascript to validate the form.
So far i have simple javascript to make sure each element is filled in,
if (document.order.suburb.value=="")
{
alert("Suburb Cannot Be Empty")
return false
}
if (document.order.postcode.value=="")
{
alert("Postcode Cannot Be Empty")
return false
}
I then have javascript to validate the length of some of the elements,
if (document.order.telephone.value.length < 10)
{
alert("Invalid Telephone Number")
return false
}
Now i'm trying to validate numeric values in the telephone number part but it's not executing correctly, it's like the code is just ignored when it's being executed.
var digits="0123456789"
var temp
var i
for (i = 0 ; i <document.order.telephone.value.length; i++)
{
temp=document.order.telephone.value.substring(i,i+1)
if (digits.indexOf(temp)==-1)
{
alert("Invalid Telephone Number")
return false
}
}
Thanks for reading and thanks for the help :) been stuck on this issue for weeks and have no idea what i'm doing wrong, i tried to code on a separate document with another form and it seemed to work fine.
EDIT
Code for validation for digits in postcode
var post = document.order.postcode.value.replace(white,'');
if(!post){
alert("Post code required !");
return false;
}
post = post.replace(/[^0-9]/g,'');//replace all other than digits
if(!post || 4 > postcode.length) {
alert("Invalid Postcode !");
return false;
}

You may try this example:
var validate = function() {
var white = /\s+/g;//for handling white spaces
var nonDigit = /[^0-9]/g; //for non digits
if(!document.order.suburb.value.replace(white, '')) {
alert("Suburb required !");
return false; //don't allow to submit
}
var post = document.order.postcode.value.replace(white, '')
if(!post) {
alert("Post code required !");
return false;
}
post = post.replace(nonDigit,'');//replace all other than digits
if(!post || 6 > post.length) { //min post code length
alert("Invalid Post code !");
return false;
}
var tel = document.order.telephone.value.replace(white, '');
if(!tel) {
alert("Telephone required !");
return false;
}
tel = tel.replace(nonDigit,'');
if(!tel || 10 > tel.length) {
alert("Invalid Telephone !");
return false;
}
return true; //return true, when above validations have passed
};
<form onsubmit="return validate();" action="#" name="order">
Suburb: <input type="text" id="suburb" name="suburb" ><br/>
Post code: <input type="text" id="postcode" name="postcode"/><br/>
Telephone: <input type="text" id="telephone" name="telephone"/><br/>
<input type="reset"/><input type="submit"/>
</form>

Here is a FIDDLE that will give you something to think about.
You could handle this task in hundreds of ways. I've just used a regex and replaced all of the non-numbers with '' - and compared the length of two variables - if there is anything other than a number the length of the regex variable will be shorter than the unchanged mytelephone.
You can do all kinds of "validation" - just me very specific in how you define "valid".
JS
var mysuburb, mypostcode, mytelephone;
$('.clickme').on('click', function(){
mysuburb = $('.suburb').val();
mypostcode = $('.postcode').val();
mytelephone = $('.telephone').val();
console.log(mysuburb + '--' + mypostcode + '--' + mytelephone);
if(mysuburb.length < 1)
{
$('.errorcode').html('');
$('.errorcode').append('Suburb is required');
return false;
}
if(mypostcode.length < 1)
{
$('.errorcode').html('');
$('.errorcode').append('postode is required');
return false;
}
if( mytelephone.length < 1 )
{
$('.errorcode').html('');
$('.errorcode').append('telephone number is required');
return false;
}
if( mytelephone.length != mytelephone.replace(/[^0-9]/g, '').length)
{
$('.errorcode').html('');
$('.errorcode').append('telephone number must contain only numbers');
return false;
}
});

Phone Number Javascript Validation

Hello I am having trouble with my javascript validation. I am trying to validate a Phone number which I want it to display only numbers and single spaces.
My Javascript code:
<script type="text/javascript">
function validateForm()
{
var x=document.forms["checkout_details"]["phone"].value;
if (!isNaN(phone).value)//if the entered phone number is not a number
{
alert("Please enter a valid phone number");
ret = false;//return false, form is not submitted
}
}
</script>
HTML/PHP Code:
echo '<form name="checkout_details" action="confirm.php" onsubmit="return validateForm()" method="post">';
echo '<font color="red">*</font> <b>Phone Number:</b> <input type="text" name="phone" id="phone"><br /><br />';
echo '<input type="submit" value="Purchase">';
</form>
Anyone help me out tell me what i'm doing wrong. Thanks.

This is incorrect:
if (!isNaN(phone).value)//if the entered phone number is not a number
That actually evaluates to if it IS a number (double negative makes a positive). Also, ret = false; should be return false;
To remove spaces from the input before checking if it is valid, see this answer.

Try this
function validateForm()
{
var x=document.forms["checkout_details"]["phone"].value;
if (!isNaN(x))
{
alert("Please enter a valid phone number");
return false;
}
else
return true;
}

Your function needs to return true or false. A false return will prevent your form from posting.
So change this:
ret = false;//return false, form is not submitted
to:
return false;//return false, form is not submitted
Additionally, you cannot rely on isNaN to validate this field. In addition to not taking into account any phone numbers with spaces or other characters, it will not work correctly in some cases, and in this case you are negating its return value (!isNaN(x)), which means it won't work at all unless you fix that. You are better off using a regular expression to validate this field.

Validate (Australian) Phone Numbers in Javascript

I need to validate Australian phone numbers (e.g. 02[3-9]\d{7} or 07[3-9]\d{7} or 04[\d]{8}) in JavaScript.
Requirements:
must be 10 digits
no commas
no dashes
no + in front
must begin with 0
At the moment I can validate required fields and email address but I want to add phone number validation.
<html>
<head>
<script type="text/javascript">
function validateForm() {
var x=document.forms["form3"]["name"].value;
if (x==null || x=="") {
alert("Name must be filled out");
return false;
}
var s=document.forms["form3"]["phone"].value;
if (s==null || s=="") {
alert("Please Enter your Phone or Mobile Number - Preferably Phone Number");
return false;
}
var s=document.forms["form3"]["email"].value;
if (s==null || s=="") {
alert("Please Enter a valid email address");
return false;
}
var k=document.forms["form3"]["email"].value;
var atpos=k.indexOf("#");
var dotpos=k.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=k.length) {
alert("Email Address is Not Valid. Please provide your correct email address.");
return false;
}
}
</script>
</head>
<body>
<form action="/thank-you.php" name="form3" method="post" onsubmit="return validateForm();" >
Your name* <input type="text" name="name" />
Phone number* <input type="text" name="phone" />
Email* <input type="text" name="email" />
<input type="submit" value="sumbit" name="submit" class="button" onclick="javascript:return validateMyForm();" /><input type="reset" value="Reset" class="resetbutton" />
</form>
</body>
</html>
Can someone help out?

Here is a regex that I would recomment
var pattern = /^0[0-8]\d{8}$/g;
So input must start with 0, and followed by a digit and it must be one between 0-8. Then it must have 8 more digit numbers.
Valid phone number examples:
0010293999 (ok)
0110293999 (ok)
0210293999 (ok)
0910293999 (nope)
//Implementation
........
var phoneNumber =document.forms["form3"]["phone"].value;
var phonePattern = /^0[0-8]\d{8}$/g;
//phone number is not valid. Please notice that you don't need to check if it's empty or null since Regex checks it for you anyways
if (!phoneNumber.test(phonePattern))
{
alert("Please Enter your Phone or Mobile Number - Preferably Phone Number");
return false;
}
..........
---- Edit
........
var phoneNumber =document.forms["form3"]["phone"].value;
var phonePattern = /^0[0-8]\d{8}$/g;
//phone number is not valid. Please notice that you don't need to check if it's empty or null since Regex checks it for you anyways
if (!phonePattern.test(phoneNumber))
{
alert("Please Enter your Phone or Mobile Number - Preferably Phone Number");
return false;
}
..........

Thanks to Paul Ferrett for this (php not js, but the regex should translate):
<?php
function validate_phone($number) {
$number = preg_replace('/[^\d]/', '', $number);
return preg_match('/^(0(2|3|4|7|8))?\d{8}$/', $number)
|| preg_match('/^1(3|8)00\d{6}$/', $number)
|| preg_match('/^13\d{4}$/', $number);
}
NB: "MIT License"

Take a look at the Javascript RegExp Object and RegExp test() method.
var patt = /04[\d]{8}/g; // Shorthand for RegExp object
var phoneNumber1 = '0412345678';
var result1 = patt.test(phoneNumber1); // result1 is true
var phoneNumber2 = 'abc';
var result2 = patt.test(phoneNumber2); // result2 is false

You can also use the required pattern.
I've never used it before but it looks like this:
<input type="text"
id="phoneNumber"
title="Phone numbers must be 10 digits and start with 0."
required pattern="0[::digit::]{10}"
/>
// It's late, no idea if that's a valid regex or if works with POSIX.
See this html5rocks article for more info:
http://www.html5rocks.com/en/tutorials/forms/html5forms/#toc-validation

Here is a more robust Australian phone regex. Courtesy of this SO question.
let phonePattern = /^(?:\+?(61))? ?(?:\((?=.*\)))?(0?[2-57-8])\)? ?(\d\d(?:[- ](?=\d{3})|(?!\d\d[- ]?\d[- ]))\d\d[- ]?\d[- ]?\d{3})$/
Testing:
0412123123 TRUE
0491579999 TRUE
0491572983 TRUE
0712122123 TRUE
0212122123 TRUE
0000000000 FALSE
5555551234 FALSE
04121231231 FALSE
041212312 FALSE