May I know what error cause my input field cannot type characters? Because after set ></\":*?| these symbol restrict in the input field, other character cannot type in the input field.
<!DOCTYPE html>
<html>
<body>
<h1>Can't type character in the input field</h1>
<input type="text" class="form-control blank" id="function_code" name="function_code" title="function_code" onpaste="return false">
<div id="error-box"></div>
</body>
</html>
<script>
function showError (key) {
var errBox = document.querySelector("#error-box");
errBox.textContent = "The character " + key.toString() + " is not allowed!";
//Dismiss the error
window.setTimeout(function () {
errBox.textContent = "";
}, 10000)
}
document.getElementById("function_code").onkeypress = function(e) {
var chr = String.fromCharCode(e.which);
if ("></\":*?|".indexOf(chr) >= 0)
showError(chr)
return false;
};
</script>
Hope someone can help me solve this problem. Thanks.
if ("></\":*?|".indexOf(chr) >= 0){
showError(chr)
return false;
}
return true // !!!
<!DOCTYPE html>
<html>
<body>
<h1>Can't type character in the input field</h1>
<input type="text" class="form-control blank" id="function_code" name="function_code" title="function_code" onpaste="return false">
<div id="error-box"></div>
</body>
</html>
<script>
function showError (key) {
var errBox = document.querySelector("#error-box");
errBox.textContent = "The character " + key.toString() + " is not allowed!";
//Dismiss the error
window.setTimeout(function () {
errBox.textContent = "";
}, 10000)
}
document.getElementById("function_code").onkeypress = function(e) {
var chr = String.fromCharCode(e.which);
if ("></\":*?|".indexOf(chr) >= 0){
showError(chr)
return false;
}
return true
};
</script>
Just remove the return false;
or change it to true
if you return false nothing will be typed
<!DOCTYPE html>
<html>
<body>
<h1>Can't type character in the input field</h1>
<input type="text" class="form-control blank" id="function_code" name="function_code" title="function_code" onpaste="return false">
<div id="error-box"></div>
</body>
</html>
<script>
function showError (key) {
var errBox = document.querySelector("#error-box");
errBox.textContent = "The character " + key.toString() + " is not allowed!";
//Dismiss the error
window.setTimeout(function () {
errBox.textContent = "";
}, 10000)
}
document.getElementById("function_code").onkeypress = function(e) {
var chr = String.fromCharCode(e.which);
if ("></\":*?|".indexOf(chr) >= 0)
showError(chr)
};
</script>
Related
This is the Javascript that turns on Georgian keyboard in every input and textarea field
But I have one input field with ID user_login which type is text and of course, this javascript takes effect on this field too
I simply want to disable the effect of this javascript only for this field which ID is user_login
Please help me
thank you in advance
HTML
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="jquery.geokbd.css">
<script type="text/javascript" src="/js/jquery_min.js"></script>
<script type="text/javascript" src="jquery.geokbd.js"></script>
</head>
<body>
<div class="gk-switcher">
<input id="kbd-switcher" type="checkbox">
</div>
<form>
<input type="text" placeholder="Title">
<input type="text" placeholder="Description">
<input placeholder="Password" type="password">
<input placeholder="Email" type="email">
</form>
<input placeholder="Email" type="email">
<input placeholder="About me" maxlength="11" type="text">
<input placeholder="Username:" type="text" name="user_login" id="user_login" class="wide">
<script>
$('#kbd-switcher').geokbd();
</script>
</body>
</html>
and code
(function($, undefined) {
$.fn.geokbd = function(options) {
var
isOn,
inputs = $([]),
switchers = $([]),
defaults = {
on: true,
hotkey: '`'
},
settings = (typeof options === 'object' ? $.extend({}, defaults, options) : defaults);
// first come up with affected set of input elements
this.each(function() {
var $this = $(this);
if ($this.is(':text, textarea')) {
inputs = inputs.add($this);
} else if ($this.is('form')) {
inputs = inputs.add($this.find(':text, textarea'));
} else if ($this.is(':checkbox')) {
if (!inputs.length) {
inputs = $(':text, textarea');
}
switchers = switchers.add($this); // store the checkboxes for further manipulation
}
if (typeof settings.exclude === 'string') {
inputs = inputs.not(settings.exclude);
}
});
// mutate switchers
switchers
.click(function() { toggleLang() })
.wrap('<div class="gk-switcher"></div>')
.parent()
.append('<div class="gk-ka" /><div class="gk-us" />');
// turn on/off all switchers
toggleLang(isOn = settings.on);
$(document).keypress(function(e) {
var ch = String.fromCharCode(e.which), kach;
if (settings.hotkey === ch) {
toggleLang();
e.preventDefault();
}
if (!isOn || !inputs.filter(e.target).length) {
return;
}
kach = translateToKa.call(ch);
if (ch != kach) {
if (navigator.appName.indexOf("Internet Explorer")!=-1) {
window.event.keyCode = kach.charCodeAt(0);
} else {
pasteTo.call(kach, e.target);
e.preventDefault();
}
}
});
function toggleLang() {
isOn = arguments[0] !== undefined ? arguments[0] : !isOn;
switchers
.each(function() {
this.checked = isOn;
})
.closest('.gk-switcher')[isOn ? 'addClass' : 'removeClass']('gk-on');
}
// the following functions come directly from Ioseb Dzmanashvili's GeoKBD (https://github.com/ioseb/geokbd)
function translateToKa() {
/**
* Original idea by Irakli Nadareishvili
* http://www.sapikhvno.org/viewtopic.php?t=47&postdays=0&postorder=asc&start=10
*/
var index, chr, text = [], symbols = "abgdevzTiklmnopJrstufqRySCcZwWxjh";
for (var i = 0; i < this.length; i++) {
chr = this.substr(i, 1);
if ((index = symbols.indexOf(chr)) >= 0) {
text.push(String.fromCharCode(index + 4304));
} else {
text.push(chr);
}
}
return text.join('');
}
function pasteTo(field) {
field.focus();
if (document.selection) {
var range = document.selection.createRange();
if (range) {
range.text = this;
}
} else if (field.selectionStart != undefined) {
var scroll = field.scrollTop, start = field.selectionStart, end = field.selectionEnd;
var value = field.value.substr(0, start) + this + field.value.substr(end, field.value.length);
field.value = value;
field.scrollTop = scroll;
field.setSelectionRange(start + this.length, start + this.length);
} else {
field.value += this;
field.setSelectionRange(field.value.length, field.value.length);
}
};
}
}(jQuery));
If you call your plugin on the form element, instead of the checkbox and then search the document for all desired element types except the one with the id of user_login, your inputs JQuery wrapper will only contain the elements you want.
(function($, undefined) {
$.fn.geokbd = function(options) {
var
isOn,
inputs = $([]),
switchers = $([]),
defaults = {
on: true,
hotkey: '`'
},
settings = (typeof options === 'object' ? $.extend({}, defaults, options) : defaults);
// first come up with affected set of input elements
// Using the standard DOM API, search the document for all `input` and
// 'textarea' elements, except for the one with an id of: "user_login"
document.querySelectorAll("input:not(#user_login), textarea").forEach(function(item) {
var $this = $(item);
// You had the selector for an input incorrect
if ($this.is('input[type="text"], textarea')) {
inputs = inputs.add($this);
} else if ($this.is('form')) {
inputs = inputs.add($this.find('input[type="text"], textarea'));
} else if ($this.is(':checkbox')) {
if (!inputs.length) {
inputs = $('input[type="text"], textarea');
}
switchers = switchers.add($this); // store the checkboxes for further manipulation
}
if (typeof settings.exclude === 'string') {
inputs = inputs.not(settings.exclude);
}
});
// mutate switchers
switchers
.click(function() { toggleLang() })
.wrap('<div class="gk-switcher"></div>')
.parent()
.append('<div class="gk-ka" /><div class="gk-us" />');
// turn on/off all switchers
toggleLang(isOn = settings.on);
$(document).keypress(function(e) {
var ch = String.fromCharCode(e.which), kach;
if (settings.hotkey === ch) {
toggleLang();
e.preventDefault();
}
if (!isOn || !inputs.filter(e.target).length) {
return;
}
kach = translateToKa.call(ch);
if (ch != kach) {
if (navigator.appName.indexOf("Internet Explorer")!=-1) {
window.event.keyCode = kach.charCodeAt(0);
} else {
pasteTo.call(kach, e.target);
e.preventDefault();
}
}
});
function toggleLang() {
isOn = arguments[0] !== undefined ? arguments[0] : !isOn;
switchers
.each(function() {
this.checked = isOn;
})
.closest('.gk-switcher')[isOn ? 'addClass' : 'removeClass']('gk-on');
}
// the following functions come directly from Ioseb Dzmanashvili's GeoKBD (https://github.com/ioseb/geokbd)
function translateToKa() {
/**
* Original idea by Irakli Nadareishvili
* http://www.sapikhvno.org/viewtopic.php?t=47&postdays=0&postorder=asc&start=10
*/
var index, chr, text = [], symbols = "abgdevzTiklmnopJrstufqRySCcZwWxjh";
for (var i = 0; i < this.length; i++) {
chr = this.substr(i, 1);
if ((index = symbols.indexOf(chr)) >= 0) {
text.push(String.fromCharCode(index + 4304));
} else {
text.push(chr);
}
}
return text.join('');
}
function pasteTo(field) {
field.focus();
if (document.selection) {
var range = document.selection.createRange();
if (range) {
range.text = this;
}
} else if (field.selectionStart != undefined) {
var scroll = field.scrollTop, start = field.selectionStart, end = field.selectionEnd;
var value = field.value.substr(0, start) + this + field.value.substr(end, field.value.length);
field.value = value;
field.scrollTop = scroll;
field.setSelectionRange(start + this.length, start + this.length);
} else {
field.value += this;
field.setSelectionRange(field.value.length, field.value.length);
}
};
}
$('form').geokbd();
}(jQuery));
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="jquery.geokbd.css">
</head>
<body>
<div class="gk-switcher">
<input id="kbd-switcher" type="checkbox">
</div>
<form>
<input type="text" placeholder="Title">
<input type="text" placeholder="Description">
<input placeholder="Password" type="password">
<input placeholder="Email" type="email">
</form>
<input placeholder="Email" type="email">
<input placeholder="About me" maxlength="11" type="text">
<input placeholder="Username:" type="text" name="user_login" id="user_login" class="wide">
</body>
</html>
I've picked up this code and it does not seem to work. The problem is the 'submit' button is not active when i try to click after i entered all the data to the form. Any help on where i am lacking? please
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<form id="ourForm">
<label>First Name</label><input type="text" /><br />
<label>Last Name</label><input type="text" /><br />
<label>Email</label><input type="text" /><br />
<input type="submit" value="submit" />
</form>
<script type="text/javascript">
function addEvent(to, type, fn){
if(document.addEventListener){
to.addEventListener(type, fn, false);
} else if(document.attachEvent){
to.attachEvent('on'+type, fn);
} else {
to['on'+type] = fn;
}
};
var Form = {
validClass : 'valid',
fname : {
minLength : 1,
maxLength : 15,
fieldName : 'First Name'
},
lname : {
minLength : 1,
maxLength : 25,
fieldName : 'Last Name'
},
validateLength : function(formEl, type){
if(formEl.value.length > type.maxLength || formEl.value.length < type.minLength ){
formEl.className = formEl.className.replace(' '+Form.validClass, '');
return false;
} else {
if(formEl.className.indexOf(' '+Form.validClass) == -1)
formEl.className += ' '+Form.validClass;
return true;
}
},
validateEmail : function(formEl){
var regEx = /^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*#([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$/;
var emailTest = regEx.test(formEl.value);
if (emailTest) {
if(formEl.className.indexOf(' '+Form.validClass) == -1)
formEl.className += ' '+Form.validClass;
return true;
} else {
formEl.className = formEl.className.replace(' '+Form.validClass, '');
return false;
}
},
getSubmit : function(formID){
var inputs = document.getElementById(formID).getElementsByTagName('input');
for(var i = 0; i < inputs.length; i++){
if(inputs[i].type == 'submit'){
return inputs[i];
}
}
return false;
}
};
addEvent(window, 'load', function(){
var ourForm = document.getElementById('ourForm');
var submit_button = Form.getSubmit('ourForm');
submit_button.disabled = 'disabled';
function checkForm(){
var inputs = ourForm.getElementsByTagName('input');
if(Form.validateLength(inputs[0], Form.fname)){
if(Form.validateLength(inputs[1], Form.lname)){
if(Form.validateEmail(inputs[2])){
submit_button.disabled = false;
return true;
}
}
}
submit_button.disabled = 'disabled';
return false;
};
checkForm();
addEvent(ourForm, 'keyup', checkForm);
addEvent(ourForm, 'submit', checkForm);
});
</script>
</body>
</html>
I copied the code and tried the same code. It works. It might be that you filled all the three inputs but you did not put correct EMAIL that fulfills the EMAIL format(regex) in the code.
For example try to fill inputs with these three inputs someone, someone, someone#gmail.com; Submit is enabled
I'm working on a web form with several textboxes and a submit button. When the submit button is clicked, I am supposed to verify that the required fields all have input and that the age field is only numeric. For example, the user can enter 56, but 56 years-old, shouldn't be accepted. If the user enters invalid input or leaves required fields blank, the border around the appropriate textboxes should turn red.
However, as my code is written now all the required fields turn red regardless of input. Any ideas how I can fix this and make the page follow the couple of rules I listed?
Most Recent Code
<html>
<head>
<title>Project 4</title>
<style type="text/css">
body {
background-color: black;
color: blue;
text-align: center;
border: 2px double blue;
}
</style>
</head>
<body>
<h1>Welcome to my Web Form!</h1>
<p>
Please fill out the following information.<br>
Please note that fields marked with an asterisk (*) are required.
</p>
<form name="myForm" id="myForm" onsubmit="return validateForm()">
*Last Name: <br>
<input type="text" id="lastname">
<br>
First Name: <br>
<input type="text" id="firstname">
<br>
*Hobbies (separate each hobby with a comma): <br>
<input type="text" id="hobbies">
<br>
Pets:
<div id="petsContainer">
<input type="text" id="pets">
<input type="button" id="addPet" value="Add Pet">
</div>
<br>
Children:
<div id="childContainer">
<input type="text" id="children">
<input type="button" id="addKid" value="Add Child">
</div>
<br>
*Address: <br>
<input type="text" id="address">
<br>
*Phone Number:<br>
<input type="text" id="phone">
<br>
*Age: <br>
<input type="text" id="age">
<br>
<input type="submit" value="Submit">
</form>
<script type="text/javascript">
var validatePhoneOnKeyUpAttached = false;
var validateLNameOnKeyUpAttached = false;
var validateHobbiesOnKeyUpAttached = false;
var validateAddressOnKeyUpAttached = false;
var validateAgeOnKeyUpAttached = false;
function validateForm() {
if(!validatePhoneOnKeyUpAttached) {
document.getElementById("phone").onkeyup = checkPhone;
validatePhoneOnKeyUpAttached = true;
}
else if(!validateLNameOnKeyUpAttached) {
document.getElementById("lastname").onkeyup = checkEmpty;
validateLNameOnKeyUpAttached = true;
}
else if(!validateHobbiesOnKeyUpAttached) {
document.getElementById("hobbies").onkeyup = checkEmpty;
validateHobbiesOnKeyUpAttached = true;
}
else if(!validateAddressOnKeyUpAttached) {
document.getElementById("address").onkeyup = checkEmpty;
validateAddressOnKeyUpAttached = true;
}
else if(!validateAgeOnKeyUpAttached) {
document.getElementById("age").onkeyup = checkEmpty;
document.getElementById("age").onkeyup = checkAge;
validateAgeOnKeyUpAttached = true;
}
return checkEmpty() && checkPhone() && checkAge();
}
function checkPhone() {
var phone = document.forms["myForm"]["phone"].value;
var phoneNum = phone.replace(/[^\d]/g, '');
if(phoneNum.length > 6 && phoneNum.length < 11) {
document.getElementById("phone").style.borderColor="transparent";
return true;
}
else if(phoneNum.length < 7 || phoneNum.length > 10) {
document.getElementById("phone").style.borderColor="red";
return false;
}
}
function checkEmpty() {
var lname = document.forms["myForm"]["lastname"].value;
var pNum = document.forms["myForm"]["phone"].value;
var hobs = document.forms["myForm"]["hobbies"].value;
var live = document.forms["myForm"]["address"].value;
var yr = document.forms["myForm"]["age"].value;
document.getElementById("lastname").style.borderColor = (lname == "") ? "red" : "transparent";
document.getElementById("hobbies").style.borderColor = (hobs == "") ? "red" : "transparent";
document.getElementById("phone").style.borderColor = (pNum == "") ? "red" : "transparent";
document.getElementById("address").style.borderColor = (live == "") ? "red" : "transparent";
document.getElementById("age").style.borderColor = (yr == "") ? "red" : "transparent";
}
function checkAge() {
var age = document.getElementById("age").value;
if(isNan(age)) {
return false;
}
else {
document.getElementById("age").style.borderColor="red";
return true;
}
}
document.getElementById("addPet").onclick=function() {
var div = document.getElementById("petsContainer");
var input = document.createElement("input");
input.type = "text";
input.name = "pats[]";
div.appendChild(document.createElement("br"));
div.appendChild(input);
}
document.getElementById("addKid").onclick=function() {
var div = document.getElementById("childContainer");
var input = document.createElement("input");
input.type = "text";
input.name = "child[]";
div.appendChild(document.createElement("br"));
div.appendChild(input);
}
</script>
</body>
</html>
The problem I'm currently having is that when I click the submit button, all the fields turn red for a split second, but then go back to the regular color and the input is erased. Any thoughts on how to fix this?
By including all of the borderColor="red" statements in a single code block, you're applying that style to all your inputs, even if only one of them failed validation. You need to separate out each statement so that it only applies to the individual field(s) that failed validation:
document.getElementById("lastname").style.borderColor = (lname == "") ? "red" : "transparent";
document.getElementById("phone").style.borderColor = (pNum == "") ? "red" : "transparent";
...
Also, I'm using the ternary operator ? : to clean up the code as well. These statements would replace the if-else block you've written.
I am using the following javascript functions in order to validate my form variables. Hope these will helpful for you.
var W3CDOM = (document.getElementsByTagName && document.createElement);
window.onload = function () {
document.forms[0].onsubmit = function () {
return validate()
}
}
function validate() {
validForm = true;
firstError = null;
errorstring = '';
var x = document.forms[0].elements;
for (var i = 0;i < x.length;i++) {
if (!x[i].value) {
validForm = false;
writeError(x[i], 'This field is required');
}
}
// This can be used to validate input type Email values
/* if (x['email'].value.indexOf('#') == -1) {
validForm = false;
writeError(x['email'],'This is not a valid email address');
}
*/
if (!W3CDOM)
alert(errorstring);
if (firstError)
firstError.focus();
return validForm;
}
function writeError(obj, message) {
validForm = false;
//if (obj.hasError) return false;
if (W3CDOM) {
obj.className += ' error';
obj.onchange = removeError;
var sp = document.createElement('span');
sp.className = 'error';
sp.appendChild(document.createTextNode(message));
obj.parentNode.appendChild(sp);
obj.hasError = sp;
} else {
errorstring += obj.name + ': ' + message + '\n';
obj.hasError = true;
}
if (!firstError)
firstError = obj;
return false;
}
function removeError() {
this.className = this.className.substring(0, this.className.lastIndexOf(' '));
this.parentNode.removeChild(this.hasError);
this.hasError = null;
this.onchange = null;
}
You can call the validations right after the form submission as given below.
<form name="loginForm" action="do.login" method="POST" class="form" onsubmit="return validate();">
My code follows:.
<!doctype html>
<html lang="en">
<head>
<title>Testing the textarea</title>
<style type="text/css"></style>
<script type="text/javascript" src="validation.js"></script>
</head>
<body>
<div id="wrapper">
<span id="error_box" style="display:none;"></span>
<form name="storyTeller" method="get" action="#" onSubmit="return validateForm()">
<p class="title">
<label for="title">TITLE:</label>
<input type="text" id="title" name="title" required onBlur="validateTitle(title)"/>
</p>
<textarea name="entry" id="entry" rows="10" cols="45" onBlur="validateEntry(entry)">
</textarea>
<input type="submit" value="submit" />
</form>
</div>
</body>
</html>
Content of validation.js:
function validateTitle(title){/*validating the title*/
if (isNaN(document.getElementById('title').value)){
document.getElementById('title').style.background="#ccffcc";
document.getElementById('error_box').style.display="none";
return true;
}
else{
document.getElementById('error_box').innerHTML='Please enter a valid title';
document.getElementById('error_box').style.display="block";
document.getElementById('title').style.background="red";
return false;
}
}
function validateEntry(entry){/*validating the entry*/
var x=document.getElementById('entry').value;
x = x.trim();
if((x=="")||(x==null)){
document.getElementById('entry').style.background="red";
document.getElementById('error_box').innerHTML = 'Where is your story';
document.getElementById('error_box').style.display="block";
return false;
}
else{
document.getElementById('entry').style.background="#ccffcc";
document.getElementById('error_box').innerHTML='';
document.getELementById('error_box').style.display="none";
return true;
}
}
function validateForm(){/*validating the form*/
var error = 0;
if(!validateTitle('title')){
document.getElementById('error_box').style.display="block";
error++;
}
if(!validateEntry('entry')){
document.getElementById('error_box').style.display="block";
error++;
}
if(error > 0){
return false;
}
}
make the submit button as a normal button; and when it is clicked to call the final validation function, at the end of the function you must submit the form manually if everything is right
example :
<script>
function val(){
if(document.getElementById('tb').value != "")
document.getElementById('frm').submit();
else alert('fill the text field');
}
</script>
<form id="frm" action="#">
<input type="text" id="tb"/>
<input type="button" id="btn" value="submit" onclick="val()"/>
</form>
There is an error in your scrip in function validateEntry()
change line:
document.getELementById('error_box').style.display="none";
to line:
document.getElementById('error_box').style.display="none";
Modified your code so now it works better for both submit and blur events.
In your HTML source change both onblur attributes to onblur="validateEntry(this)" and then you can use this javascript:
function validateEntry(entry) { /*validating*/
var error_box = document.getElementById('error_box');
error_box.style.display = "none";
if (entry.name == "title") { // INPUT type="text"
if (!isNaN(entry.value)) {
error_box.innerHTML = 'Please enter a valid title';
error_box.style.display = "block";
entry.style.background = "#fee";
return false;
} else {
entry.style.background = "#ccffcc";
return true;
}
} else if (entry.name == "entry") { // TEXTAREA
var x = entry.value.trim();
if ((x == "") || (x == null)) {
error_box.innerHTML = 'Where is your story?';
error_box.style.display = "block";
entry.style.background = "#fee";
return false;
} else {
entry.style.background = "#ccffcc";
return true;
}
}
}
function validateForm() { /*validating the form*/
var form = document.forms['storyTeller'];
var error_box = document.getElementById('error_box');
var error = 0;
var error_msg = '';
if (!validateEntry(form['title'])) {
error++;
error_msg += error_box.innerHTML + '<br/>';
}
if (!validateEntry(form['entry'])) {
error++;
error_msg += error_box.innerHTML;
}
if (error > 0) {
error_box.innerHTML = error_msg;
error_box.style.display = "block";
return false;
} else {
error_box.style.display = "none";
return true;
}
}
jsfiddle
Hi there I am really stuck on this and since I am a javscript beginner this boggles my mind.
Is there someone who knows how to write the following javascript form validation?
I am sure that it is very simple, but I can not figure this one out to save my life.
Thank you for you sharing your knowledge.
I need to write WITHOUT jquery the following form validation. Whenever an error is encountered, prevent the form from being submitted. I need to use the window.onload function to assign a validation callback function. There are 4 inputs which get validated by the javascript code. Also the javascript needs to be in its own file.
Validation Rules are as follow:
INPUT: Username; Required (yes); Validation (Must be 5-10 characters long).
INPUT: Email; Required (yes); Validation (Must have an # sign, must have a period).
INPUT: Street name; Required (no); Validation (Must start with a number).
INPUT: Year of birth; Required (yes); Validation (must be numeric).
My code looks as follow:
HTML:
<!DOCTYPE html>
<html>
<head>
<script defer="defer" type="text/javascript" src="form.js"></script>
</head>
<body>
<form action="fake.php">
Username*: <input type="text" class="required" name="u"/><br/>
Email*: <input type="text" class="required" name="p"/><br/>
Street address: <input type="text" class="numeric" name="s"/><br/>
Year of birth*: <input type="text" class="required numeric" name="b"/><br/>
<input type="submit"/><br/>
</form>
</body>
</html>
JS
document.forms[0].elements[0].focus();
document.forms[0].onsubmit=function(){
for(var i = 0; i < document.forms[0].elements.length; i++){
var el = document.forms[0].elements[i];
if((el.className.indexOf("required") != -1) &&
(el.value == "")){
alert("missing required field");
el.focus();
el.style.backgroundColor="yellow";
return false;
}
if((el.className.indexOf("numeric") != -1) &&
(isNaN(el.value))){
alert(el.value + " is not a number");
el.focus();
el.style.backgroundColor="pink";
return false;
}
}
}
without changing much of your code ... updated your code for other validation like length (needs a class verifylength to validate length) and so on....
try this
HTML
<form action="fake.php">Username*:
<input type="text" class="required verifylength" name="u" />
<br/>Email*:
<input type="text" class="required email" name="p" />
<br/>Street address:
<input type="text" class="numeric" name="s" />
<br/>Year of birth*:
<input type="text" class="required numeric" name="b" />
<br/>
<input type="submit" />
<br/>
</form>
JAVASCRIPT
document.forms[0].elements[0].focus();
document.forms[0].onsubmit = function () {
for (var i = 0; i < document.forms[0].elements.length; i++) {
var el = document.forms[0].elements[i];
if ((el.className.indexOf("required") != -1) && (el.value == "")) {
alert("missing required field");
el.focus();
el.style.backgroundColor = "yellow";
return false;
} else {
if (el.className.indexOf("verifylength") != -1) {
if (el.value.length < 5 || el.value.length > 10) {
alert("'" + el.value + "' must be 5-10 charater long");
el.focus();
el.style.backgroundColor = "pink";
return false;
}
}
}
if (el.className.indexOf("email") != -1) {
var regEx = /^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*#([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$/;
var emailTest = regEx.test(el.value);
if (!emailTest) {
alert("email not valid");
el.focus();
el.style.backgroundColor = "yellow";
return false;
}
};
if ((el.className.indexOf("numeric") != -1) && (isNaN(el.value))) {
alert(el.value + " is not a number");
el.focus();
el.style.backgroundColor = "pink";
return false;
}
}
}
working fiddle
something alongs the lines of...
//username 5-10 chars
var uVal = document.getElementsByTagName("u").value;
if (uVal.length < 5 || uVal.length > 10) return false;
//email needs # and .
var eVal = document.getElementsByTagName("p").value;
if !(eVal.match('/.*#.*\./g')) return false;
//street starts w/ num
var sVal = document.getElementsByTagName("s").value;
if !(sVal.match('/^[0-9]/g')) return false;
i think the regex is off + untested :)
Here is your javascript validation object in work. Hope you can make some modification according to your need.
Style
<style>
.valid {border: #0C0 solid 1px;}
.invalid {border: #F00 solid 1px;}
</style>
HTML Form
<div>
<form id="ourForm">
<label>First Name</label><input type="text" name="firstname" id="firstname" class="" /><br />
<label>Last Name</label><input type="text" name="lastname" id="lastname" class="" /><br />
<label>Username</label><input type="text" name="username" id="username" class="" /><br />
<label>Email</label><input type="text" name="email" id="email" class="" /><br />
<input type="submit" value="submit" class="" />
</form>
</div>
Call script before closing tag
<script src="form_validation_object.js"></script>
form_validation_object.js
/*
to: dom object
type: type of event
fn: function to run when the event is called
*/
function addEvent(to, type, fn) {
if (document.addEventListener) { // FF/Chrome etc and Latest version of IE9+
to.addEventListener(type, fn, false);
} else if (document.attachEvent) { //Old versions of IE. The attachEvent method has been deprecated and samples have been removed.
to.attachEvent('on' + type, fn);
} else { // IE5
to['on' + type] = fn;
}
}
// Your window load event call
addEvent(window, 'load', function() {
/* form validation object */
var Form = {
validClass: 'valid',
inValidClass: 'invalid',
fname: {
minLength: 1,
maxLength: 8,
fieldName: 'First Name'
},
lname: {
minLength: 1,
maxLength: 12,
fieldName: 'Last Name'
},
username: {
minLength: 5,
maxLength: 10,
fieldName: 'Username'
},
validateLength: function(formElm, type) {
//console.log('string = ' + formElm.value);
//console.log('string length = ' + formElm.value.length);
//console.log('max length=' + type.maxLength);
//console.log(Form.validClass);
if (formElm.value.length > type.maxLength || formElm.value.length < type.minLength) {
//console.log('invalid');
//alert(formElm.className);
if (formElm.className.indexOf(Form.inValidClass) == -1) {
if (formElm.className.indexOf(Form.validClass) != -1) {
formElm.className = formElm.className.replace(Form.validClass, Form.inValidClass);
} else {
formElm.className = Form.inValidClass;
}
}
//alert(formElm.className);
return false;
} else {
//console.log('valid');
//alert(formElm.className.indexOf(Form.validClass));
if (formElm.className.indexOf("\\b" + Form.validClass + "\\b") == -1) { // regex boundary to match whole word only http://www.regular-expressions.info/wordboundaries.html
//formElm.className += ' ' + Form.validClass;
//alert(formElm.className);
if (formElm.className.indexOf(Form.inValidClass) != -1)
formElm.className = formElm.className.replace(Form.inValidClass, Form.validClass);
else
formElm.className = Form.validClass;
}
return true;
}
},
validateEmail: function(formElm) {
var regEx = /^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*#([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$/;
var emailTest = regEx.test(formElm.value);
if (emailTest) {
if (formElm.className.indexOf(Form.validClass) == -1) {
formElm.className = Form.validClass;
}
return true;
} else {
formElm.className = Form.inValidClass;
return false;
}
},
getSubmit: function(formID) {
var inputs = document.getElementById(formID).getElementsByTagName('input');
for (var i = 0; i < inputs.length; i++) {
if (inputs[i].type == 'submit') {
return inputs[i];
}
}
return false;
}
}
/* call validation object */
var ourForm = document.getElementById('ourForm');
var submit_button = Form.getSubmit('ourForm');
submit_button.disabled = 'disabled';
function checkForm() {
var inputs = ourForm.getElementsByTagName('input');
if (Form.validateLength(inputs[0], Form.fname)) {
if (Form.validateLength(inputs[1], Form.lname)) {
if (Form.validateLength(inputs[2], Form.username)) {
if (Form.validateEmail(inputs[3])) {
submit_button.disabled = false;
return true;
}
}
}
}
submit_button.disabled = 'disabled';
return false;
}
checkForm();
addEvent(ourForm, 'keyup', checkForm);
addEvent(ourForm, 'submit', checkForm);
});
Working example at JSBin
http://jsbin.com/ezujog/1