Textbox value compare before submitting - javascript

I want to let my two textboxes be checked before those get submitted.
like
if textbox1 >= textbox2 submit
else show errorlabel and dont submit.
How can i do this?

Provide your onclick handler's implementation to extract the value of the two text boxes, then parse them as an int.
function submitForm() {
var first = parseInt(document.getElementById("first"), 0);
var second = parseInt(document.getElementById("second"), 0);
if(first >= second) {
// ...
return true;
} else {
var hiddenTextBox = document.getElementById("error");
hiddenTextBox.style.visibility = "visible";
return false;
}
}
This assumes you have two elements with id="first" and id="second" respectively, and a hidden element with id="error"

Try it like,
$('#submitId').on('click',function(){
if $('#textbox1').val() < $('#textbox2').val()){
$('#erroLabel').show(); // showing error label
return false; // to prevent submitting form
}
});

You can make function in javascript,
<script type="text/javascript">
function checkValues()
{
var searchtext1 = document.getElementById("textbox1").value;
if(searchtext1=='')
{
alert('Enter any character');
return false;
}
var searchtext2 = document.getElementById("textbox2").value;
if(searchtext2=='')
{
alert('Enter any character');
return false;
}
}
</script>
and then in html form
<form method='GET' onSubmit="return checkValues();">
<input type="text" id= "textbox1" name="textbox1" class='textbox' >
<input type="text" id= "textbox2" name="textbox2" class='textbox' >
<input type="submit" id='submit' value="Search" class ='button' >
</form>

Related

How can i submit a fom when their is multiple functions are created , which function to call on evnets like onclick and onsubmit?

<html>
<body>
<form onsubmit="return myFunction()">
<input type="text" id="txt">
<input type="text" id="txt1">
<input type="button" value="click" id="btn">
</form>
</body>
<script>
var a = document.getElementById("txt");
var b = document.getElementById("txt1");
var save = document.getElementById("btn");
//save.addEventListener("click" , myFun);
save.onclick = function(){myFunction()};
//save.addEventListener("click" , myFunction);
function myFunction(){
if((a.value=="") || (b.value=="")){
alert("fill something");
return false;
}else{
alert("all ok");
location.href="sec.html";
return true;
}
//a.addEventListener("keyup" , myFun);
//b.addEventListener("keyup" , myFun);
}
a.addEventListener("keyup" , myKeyFun);
b.addEventListener("keyup" , myKeyFun);
function myKeyFun()
{
if(a.value!==b.value){
alert("mismatched");
return false;
}else{
return true;
}
}
</script>
</html>
i have created many function for different - different validation so now i want to submit the form and redirect to another page when all the cinditons are true.
but here form is getting submitted even when the conditions are not true, i have wrote this code just to understand.
the actual code is quite big so i have wrote this to understand how i would have to call the main function to submit the form when there is multilpe function
Don't mess by making different functions. Do it with conditions as below.
var a = document.getElementById("txt");
var b = document.getElementById("txt1");
var save = document.getElementById("btn");
function myFunction() {
if(a.value == ""){
alert("Please fill Text 1");
}else if(b.value == ""){
alert("Please fill Text 2");
}else if (a.value != b.value){
alert("Text 1 and Text 2 must be same");
}
else{
alert("Successfully submitted");
//redirect to another page code;
}
}
function textTwoFun(){
if(a.value != b.value){
alert('Value missmatched! Text 1 and Text 2 must be same');
}
}
<form>
<input type="text" id="txt" placeholder="Text 1">
<input type="text" id="txt1" onkeyup="textTwoFun()" placeholder="Text 2">
<input type="button" onclick="myFunction()" value="click" id="btn">
</form>

what is the correct way to validate form with javascript

should i put "submit" instead "form_name" in the last block of code? what is the correct way?
thanks!
function check() {
var title = document.getElementById("title");
var content = document.getElementById("content");
if (title == "") {
alert("title is required");
return false;
}
if (content == "") {
alert("content is required");
return false;
}
var submit = document.getElementById("form_name");
submit.submit();
}
this is my form
<form action="#" method="post" id="form_name" name="form_name">
<input type="text" name="title" id="title" />
<textarea name="content" id="content" cols="30" rows="10"></textarea>
<input type="submit" value="Submit" id="submit" name="submit" onclick="return check();"/>
</form>
First you are selecting an element and acting like it is the value
var title = document.getElementById("title"); <-- DOM element
if (title == "") { <-- checking the DOM against a string.
You should be using .value to get what was entered.
Next you are submitting the form.... but you clicked on a submit button inside of the form so that will submit the form. So that is not needed.
function check() {
var title = document.getElementById("title").value;
var content = document.getElementById("content").value;
if (!title.trim().length) {
alert("title is required");
return false;
else if (!content.trim().length) {
alert("content is required");
return false;
}
return true
}
And never name anything submit, it just leads to problems.
In most recent browsers you have more power to use
function myFunction() {
var inpObj = document.getElementById("id1");
if (inpObj.checkValidity() == false) {
document.getElementById("demo").innerHTML = inpObj.validationMessage;
}else{
document.getElementById("demo").innerHTML = "";
}
}
<input id="id1" type="number" min="100" max="300" required>
<button onclick="myFunction()">OK</button>
<p id="demo"></p>
Reference:
https://www.w3schools.com/js/js_validation_api.asp

Javascript: How to disable submit button until all fields are validated?

I have several validation functions that work fine and I want to write an additional validation in simple javascript (no jQuery, etc) for the entire form that disables/enables the Submit button depending on whether the other validation functions return true or false. How do I go about that?
For example, for my main HTML I have:
<form id="form" method="POST">
<label class="form">Field 1</label><input type="text" name="input1" onkeyup="validateInput1(); return false">
<label class="form">Field 2</label><input type="text" name="input2" onkeyup="validateInput2(); return false">
...
<button id="submit" type="submit" value="submit">Submit</button>
</form>
For my script I have:
function validateInput1(){
...
}
function validateInput2(){
...
}
Now I want to write a function with something like:
function validateForm(){
var submitButton = document.getElementById('submit');
submitButton.disabled = true;
/*If all other validation functions like validateInput1() returns true then submitButton.disabled = false*/
}
How do I do this?
Start the button off as disabled. Hook to the onchange event for each of the form inputs, and then have it check the validateForm() function to see if all the forms are valid. After that, if they're all valid, set the submit button to enabled, otherwise set it to disabled.
var inputs = document.querySelectorAll('#form input');
var validateInput1 = function()
{
return document.getElementById('input1').value != '';
}
var validateInput2 = function()
{
return document.getElementById('input2').value != '';
}
var validateForm = function() {
if ( !validateInput1() ) {
return false;
}
if ( !validateInput2() ) {
return false;
}
return true;
}
for ( var i = 0, len = inputs.length; i < len; i++ )
{
var checkValid = function() {
document.getElementById('submit').disabled = !validateForm();
//Is the same as:
/*if ( !validateForm() )
{
document.getElementById('submitButton').disabled = true;
}
else
{
document.getElementById('submitButton').disabled = false;
}*/
}
inputs[i].addEventListener('change', checkValid);
inputs[i].addEventListener('keyup', checkValid);
}
<form id="form" method="POST" onsubmit="alert('Submitted!'); return false">
<label class="form">Field 1</label><input type="text" name="input1" id="input1">
<label class="form">Field 2</label><input type="text" name="input2" id="input2">
<button id="submit" type="submit" value="submit" disabled="disabled">Submit</button>
</form>

Check if every elemnt from a form is filled JQUERY

I have a form with all types of form elemnts and I have a code that should run through every single one of the elemnts and check their value after the submit button is clicked. Unfortunatelly, this code doesn't work completely. What I mean is that if I don't enter any value in the input, it will print the message, but if I enter some text in it, we go to the else statement, without checking the other.
Could somebody tell me why?
if($('form.registration-form :input').val() == '')
{
// Print Error Message
}
else
{
// Do something else
}
You can use filter method for this:
var emptyElements = $('form.registration-form :input').filter( function() {
return this.value === '';
});
if( emptyElements.length === 0 ) {
// all IS filled in
} else {
// all is NOT filled in
}
$('#submit').click(function(){
var emptyElements = $('form.registration-form :input').filter( function() {
return this.value === '';
});
if( emptyElements.length === 0 ) {
alert('All Filled');
} else {
alert('1 or more not filled')
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form action="" class="registration-form">
<input type="text">
<input type="text">
<input type="text">
<input type="text">
<input type="submit" id="submit" value="Check">
</form>

validation of input text field in html using javascript

<script type='text/javascript'>
function required()
{
var empt = document.forms["form1"]["Name"].value;
if (empt == "")
{
alert("Please input a Value");
return false;
}
}
</script>
<form name="form1" method="" action="">
<input type="text" name="name" value="Name"/><br />
<input type="text" name="address line1" value="Address Line 1"/><br />
I have more than one input text field, each having their default value. Before I submit the form I have to verify whether all fields are filled. So far i got the javascript to check for null since different text boxes have different default value. How can I write a javascript to verify that user has entered data? I mean, the script must identify that input data is other than default and null.
If you are not using jQuery then I would simply write a validation method that you can be fired when the form is submitted. The method can validate the text fields to make sure that they are not empty or the default value. The method will return a bool value and if it is false you can fire off your alert and assign classes to highlight the fields that did not pass validation.
HTML:
<form name="form1" method="" action="" onsubmit="return validateForm(this)">
<input type="text" name="name" value="Name"/><br />
<input type="text" name="addressLine01" value="Address Line 1"/><br />
<input type="submit"/>
</form>
JavaScript:
function validateForm(form) {
var nameField = form.name;
var addressLine01 = form.addressLine01;
if (isNotEmpty(nameField)) {
if(isNotEmpty(addressLine01)) {
return true;
{
{
return false;
}
function isNotEmpty(field) {
var fieldData = field.value;
if (fieldData.length == 0 || fieldData == "" || fieldData == fieldData) {
field.className = "FieldError"; //Classs to highlight error
alert("Please correct the errors in order to continue.");
return false;
} else {
field.className = "FieldOk"; //Resets field back to default
return true; //Submits form
}
}
The validateForm method assigns the elements you want to validate and then in this case calls the isNotEmpty method to validate if the field is empty or has not been changed from the default value. it continuously calls the inNotEmpty method until it returns a value of true or if the conditional fails for that field it will return false.
Give this a shot and let me know if it helps or if you have any questions. of course you can write additional custom methods to validate numbers only, email address, valid URL, etc.
If you use jQuery at all I would look into trying out the jQuery Validation plug-in. I have been using it for my last few projects and it is pretty nice. Check it out if you get a chance. http://docs.jquery.com/Plugins/Validation
<form name="myForm" id="myForm" method="post" onsubmit="return validateForm();">
First Name: <input type="text" id="name" /> <br />
<span id="nameErrMsg" class="error"></span> <br />
<!-- ... all your other stuff ... -->
</form>
<p>
1.word should be atleast 5 letter<br>
2.No space should be encountered<br>
3.No numbers and special characters allowed<br>
4.letters can be repeated upto 3(eg: aa is allowed aaa is not allowed)
</p>
<button id="validateTestButton" value="Validate now" onclick="validateForm();">Validate now</button>
validateForm = function () {
return checkName();
}
function checkName() {
var x = document.myForm;
var input = x.name.value;
var errMsgHolder = document.getElementById('nameErrMsg');
if (input.length < 5) {
errMsgHolder.innerHTML =
'Please enter a name with at least 5 letters';
return false;
} else if (!(/^\S{3,}$/.test(input))) {
errMsgHolder.innerHTML =
'Name cannot contain whitespace';
return false;
}else if(!(/^[a-zA-Z]+$/.test(input)))
{
errMsgHolder.innerHTML=
'Only alphabets allowed'
}
else if(!(/^(?:(\w)(?!\1\1))+$/.test(input)))
{
errMsgHolder.innerHTML=
'per 3 alphabets allowed'
}
else {
errMsgHolder.innerHTML = '';
return undefined;
}
}
.error {
color: #E00000;
}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Validation</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
var tags = document.getElementsByTagName("input");
var radiotags = document.getElementsByName("gender");
var compareValidator = ['compare'];
var formtag = document.getElementsByTagName("form");
function validation(){
for(var i=0;i<tags.length;i++){
var tagid = tags[i].id;
var tagval = tags[i].value;
var tagtit = tags[i].title;
var tagclass = tags[i].className;
//Validation for Textbox Start
if(tags[i].type == "text"){
if(tagval == "" || tagval == null){
var lbl = $(tags[i]).prev().text();
lbl = lbl.replace(/ : /g,'')
//alert("Please Enter "+lbl);
$(".span"+tagid).remove();
$("#"+tagid).after("<span style='color:red;' class='span"+tagid+"'>Please Enter "+lbl+"</span>");
$("#"+tagid).focus();
//return false;
}
else if(tagval != "" || tagval != null){
$(".span"+tagid).remove();
}
//Validation for compare text in two text boxes Start
//put two tags with same class name and put class name in compareValidator.
for(var j=0;j<compareValidator.length;j++){
if((tagval != "") && (tagclass.indexOf(compareValidator[j]) != -1)){
if(($('.'+compareValidator[j]).first().val()) != ($('.'+compareValidator[j]).last().val())){
$("."+compareValidator[j]+":last").after("<span style='color:red;' class='span"+tagid+"'>Invalid Text</span>");
$("span").prev("span").remove();
$("."+compareValidator[j]+":last").focus();
//return false;
}
}
}
//Validation for compare text in two text boxes End
//Validation for Email Start
if((tagval != "") && (tagclass.indexOf('email') != -1)){
//enter class = email where you want to use email validator
var reg = /^\w+([-+.']\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)*$/
if (reg.test(tagval)){
$(".span"+tagid).remove();
return true;
}
else{
$(".span"+tagid).remove();
$("#"+tagid).after("<span style='color:red;' class='span"+tagid+"'>Email is Invalid</span>");
$("#"+tagid).focus();
return false;
}
}
//Validation for Email End
}
//Validation for Textbox End
//Validation for Radio Start
else if(tags[i].type == "radio"){
//enter class = gender where you want to use gender validator
if((radiotags[0].checked == false) && (radiotags[1].checked == false)){
$(".span"+tagid).remove();
//$("#"+tagid").after("<span style='color:red;' class='span"+tagid+"'>Please Select Your Gender </span>");
$(".gender:last").next().after("<span style='color:red;' class='span"+tagid+"'> Please Select Your Gender</span>");
$("#"+tagid).focus();
i += 1;
}
else{
$(".span"+tagid).remove();
}
}
//Validation for Radio End
else{
}
}
//return false;
}
function Validate(){
if(!validation()){
return false;
}
return true;
}
function onloadevents(){
tags[tags.length -1].onclick = function(){
//return Validate();
}
for(var j=0;j<formtag.length;j++){
formtag[j].onsubmit = function(){
return Validate();
}
}
for(var i=0;i<tags.length;i++){
var tagid = tags[i].id;
var tagval = tags[i].value;
var tagtit = tags[i].title;
var tagclass = tags[i].className;
if((tags[i].type == "text") && (tagclass.indexOf('numeric') != -1)){
//enter class = numeric where you want to use numeric validator
document.getElementById(tagid).onkeypress = function(){
numeric(event);
}
}
}
}
function numeric(event){
var KeyBoardCode = (event.which) ? event.which : event.keyCode;
if (KeyBoardCode > 31 && (KeyBoardCode < 48 || KeyBoardCode > 57)){
event.preventDefault();
$(".spannum").remove();
//$(".numeric").after("<span class='spannum'>Numeric Keys Please</span>");
//$(".numeric").focus();
return false;
}
$(".spannum").remove();
return true;
}
if (document.addEventListener) {
document.addEventListener("DOMContentLoaded", onloadevents, false);
}
//window.onload = onloadevents;
</script>
</head>
<body>
<form method="post">
<label for="fname">Test 1 : </label><input type="text" title="Test 1" id="fname" class="form1"><br>
<label for="fname1">Test 2 : </label><input type="text" title="Test 2" id="fname1" class="form1 compare"><br>
<label for="fname2">Test 3 : </label><input type="text" title="Test 3" id="fname2" class="form1 compare"><br>
<label for="gender">Gender : </label>
<input type="radio" title="Male" id="fname3" class="gender" name="gender" value="Male"><label for="gender">Male</label>
<input type="radio" title="Female" id="fname4" class="gender" name="gender" value="Female"><label for="gender">Female</label><br>
<label for="fname5">Mobile : </label><input type="text" title="Mobile" id="fname5" class="numeric"><br>
<label for="fname6">Email : </label><input type="text" title="Email" id="fname6" class="email"><br>
<input type="submit" id="sub" value="Submit">
</form>
</body>
</html>
function hasValue( val ) { // Return true if text input is valid/ not-empty
return val.replace(/\s+/, '').length; // boolean
}
For multiple elements you can pass inside your input elements loop their value into that function argument.
If a user inserted one or more spaces, thanks to the regex s+ the function will return false.
<pre><form name="myform" action="saveNew" method="post" enctype="multipart/form-data">
<input type="text" id="name" name="name" />
<input type="submit"/>
</form></pre>
<script language="JavaScript" type="text/javascript">
var frmvalidator = new Validator("myform");
frmvalidator.EnableFocusOnError(false);
frmvalidator.EnableMsgsTogether();
frmvalidator.addValidation("name","req","Plese Enter Name");
</script>
before using above code you have to add the gen_validatorv31.js js file
For flexibility and other places you might want to validated. You can use the following function.
`function validateOnlyTextField(element) {
var str = element.value;
if(!(/^[a-zA-Z, ]+$/.test(str))){
// console.log('String contain number characters');
str = str.substr(0, str.length -1);
element.value = str;
}
}`
Then on your html section use the following event.
<input type="text" id="names" onkeyup="validateOnlyTextField(this)" />
You can always reuse the function.

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