When the user presses the submit button and there is no text in the input box, I want an error window to appear. I am using JSF to create the web page and JS for the script. For some reason the script does not run.
Here is the whole page code :
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
>
<link rel="stylesheet" href="testcss.css" />
<h:head>
<title>Print to Uni</title>
<meta http-equiv="content-type" content="text/html; charset=windows-1252" />
<link rel="stylesheet" type="text/css" href="style.css" title="style" />
</h:head>
<body>
<div id="main">
<div id="header">
<div id="logo">
<div id="logo_text">
<h1>Remote<span class="logo_colour">Printing</span></h1>
<h2>This is a web app that allows users to print to University</h2>
</div>
</div>
</div>
</div>
</body>
<div id="site_content">
<div id="content">
<h:body>
<h:form onsubmit="return required();">
Please enter your username:
<h:inputText id="Username" value="#{user.id}"
size="20" required="true" label="Username">
</h:inputText><br></br><br></br>
To print a piece of text, please press the submit button below to upload the text:<br/><br/>
<h:commandButton type="Submit" value="Submit" onclick="return username_validation()" action="upload/uploadText" styleClass="Submit"/>
</h:form>
</h:body>
</div>
</div>
<script type="text/javascript">
function username_validation(){ //cannot get this to work
if (document.getElementById("Username").value.length == 1)
{
alert("Please enter a username");
return false;
}
return true;
}
function show_alert() {
var msg = "Thank you";
alert(msg);
}
</script>
</html>
This is the code I'm trying to run when the user presses submit:
function username_validation(){ //cannot get this to work
if (document.getElementById("Username").value.length == 1)
{
alert("Please enter a username");
return false;
}
return true;
and heres the hform :
Please enter your username:
<h:inputText id="Username" value="#{user.id}"
size="20" required="true" label="Username">
</h:inputText><br></br><br></br>
To print a piece of text, please press the submit button below to upload the text:<br/><br/>
<h:commandButton type="Submit" value="Submit" onclick="return username_validation()" action="upload/uploadText" styleClass="Submit"/>
</h:form>
The problem is this line:
if (document.getElementById("Username").value.length == 1)
Will only fail if the username is exactly one character long.
If you want to validate that the username is present do the following instead:
if (document.getElementById("Username").value.length < 1)
Related
I have a JSP page with a form. I want to submit and return the input to the JSP page. I can't get it to work.
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Ejemplo</title>
<script type="text/JavaScript" src="Scripts/jquery-1.9.1.js"></script>
<script>
function enviarDatos() {
form = document.getElementById("datos");
form.datoIntroducido.value = "holaaaaaa";
form.submit();
<%System.out.println(request.getParameter("datoIntroducido"));%>
}
</script>
</head>
<body>
<h3>Ejemplo</h3>
<form name="datos" id="datos" action="mypage" method="post" enctype="multipart/form-data">
Escribe aquí: </br>
<textarea cols=50 rows=10 id="texto"></textarea><br />
<input type="hidden" name="datoIntroducido" id="datoIntroducido"/>
<input type="submit" value="Enviar datos" class="btn-primary" onclick="enviarDatos();"/>
</form>
</div>
</body>
</html>
It prints "null" when executing the first time but it doesnt write anything when pressing the button
I have form validation setup and working as you can see (using javascript), the only problem is that when someone successfully logs in, I have it redirect to login.php but if someone directly visits mysite.com/login.php they don't need a password to login. If there is any type of php code I need to add then that's fine, another option would be to change the function for the javascript on a successful login. Any info will help!
I have a password only form; here is my code:
<!doctype html>
<html>
<head>
<meta name="googlebot" content="noindex">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script type="text/javascript" src="js/account.js"></script>
<link rel="stylesheet" type="text/css" href="css/main.css">
<meta charset="utf-8">
<title>The Order of Aztec</title>
</head>
<body>
<div id="page" align="center">
<br /><br /><br />
<div align="center"><img src="images/aztec-logo.png" width="256" height="198" alt="Aztec"/></div>
<br /><br /><br /><br /><br />
<div id="error-division"></div>
<br />
<form id="myForm" align="center">
<div align="center"><input placeholder="Password" name="pword" id="pword" type="password" /></div>
<br />
<div align="center" id="agree-box"><input id="agree-box-input" onClick="login();return false;" type="checkbox">Agree that you are part of the steam group "The order of aztec."</input></div>
<br />
<div align="center"><input id="submit" type="submit" /></div>
</form>
<div id="ack"></div>
</div>
</body>
<script type="text/javascript">
function login()
{
var pass = document.getElementById('pword');
var corpass = "t";
var agree = document.getElementById('agree-box-input');
if(pass.value == corpass && agree.checked == true)
{
window.location = "login.php"
} else {
document.getElementById("error-division").innerHTML = "Wrong password or agreement not checked. Please try again.";
}
}
</script>
</html>
add if statement in your login.php
<?php
if(isset($_POST['your_username']) && isset($_POST['your_password'])){
// do your activities
}else{ ?>
<script type="Javascript">
alert("Your username / password is incorrect");
window.location = "your_validation_page.php";
</script>
<?php } ?>
I just realized that serializeArray() will not include submit input and submit button values per http://api.jquery.com/serializearray/
No submit button value is serialized since the form was not submitted
using a button.
What is the cleanest way to include the button value in the form submission?
http://jsfiddle.net/QJz35/
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" />
<title>Testing</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
$("#myForm").submit(function(){
var inputs=$(this).find(":input");
var inputs_serial=inputs.serializeArray();
console.log(this,inputs,inputs_serial);
return false;
});
});
</script>
</head>
<body>
<form id="myForm">
<input name="text" value="text" type="text">
<button name="task" value="MyTask" type="submit">My Task</button>
<input name="task" value="MyTask" type="submit">
</form>
</body>
</html>
Hello again everyone
i am working on this
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>Form</title>
<script type="text/javascript">
</script>
</head>
<body>
<h2>**Form**</h2>
<form name=form method="post" action="javascript" subject=RSVP" enctype="text/plain" >
<input type=text name="first" size="20"> First Name<BR>
<input type=text name="last" size="20"> Last Name<BR>
<input type="text" name="email" size="20"> E-Mail<BR><BR>
<input type="submit" value="Submit">
<input type="reset" value="Clear Form"><br>
</form>
</body>
</html>
I am getting really confused here.. I need to have a onsubmit form handler and a create validation script. Ok now if I am right the validation script is the the function that needs to be placed right? sorry i know some of you guys might think this is easy but I am still learning. Now I have examples in my book of it but they only due one at a time. Is there a way you can do a onsubmit of all or does it have to be one at a time? thanks
ok I have this one i am working on..
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>Form</title>
<script type="text/javascript">
<!--
function validate_form()
{
valid = true;
if ( document.contact_form.contact_first.value == "" )
{
alert ( "Please fill in the 'Your Name' box." );
valid = false;
}
return valid;
}
//-->
</script>
</head>
<body>
<h2>**Form**</h2>
<form name="contact_form" method="post" action="javascript" onSubmit="return validate_form();">
<input type=text name="contact_first" size="20"> First Name<BR>
<input type=text name="contact_last" size="20"> Last Name<BR>
<input type="text" name="contact_email" size="20"> E-Mail<BR><BR>
<input type="submit" value="Submit">
<input type="reset" value="Clear Form"><br>
</form>
</body>
</html>
now Can i just copy the function for the other two or how do i do the one for the email?
I've added an example here of how to do it:
http://jsfiddle.net/tomgrohl/JMkAP/
I added an onsubmit handler to the form:
<form method="post" action="javascript" enctype="text/plain" onsubmit="return valForm(this);">
And added this at the top of the page, a simple validation function:
<script type="text/javascript">
function valForm( form ){
var firstVal, lastVal, emailVal, error = '';
firstVal= form.first.value;
lastVal= form.last.value;
emailVal= form.email.value;
//OR
//firstVal= document.getElementById('first').value;
//lastVal= document.getElementById('last').value;
//emailVal= document.getElementById('email').value;
if( firstVal.length == 0){
error += 'First name is required\n';
}
if( lastVal.length == 0){
error += 'Last name is required\n';
}
if( emailVal.length == 0){
error += 'Email is required\n';
}
if( error ){
alert( error );
return false;
}
return true;
}
</script>
OnSubmit is invoked once for the form.
You can validate all the form fields in one onSubmit function, during one call to that function.
function myOnSubmitHandler(theForm) {
if (theForm.data1.value == "") {
alert("This field is empty.");
return false; // suppress form submission
} else {
return true; // A-OK, form will be submitted
}
}
in HTML:
<form method="POST" ACTION="SomethingOnServer.php"
onSubmit="return myOnSubmitHandler(this);">
I need to have a onsubmit form handler
You said it; <form onsubmit="return myValidate(this);" .... >
myValidate is your validation function that returns true|false indicating whether or not you want the form to be submitted to its handler script (which your also missing).
might I suggest you use jQuery and jQuery validate to validate your form no need to re-invent the wheel
be sure to check out validator's demo
I have a header message that is brought in from another file (message.txt), and I'm making a text box that you can edit. (I will add the part where it makes it permanent later on.)
It is changing to nothing.
(E: "This is the header!" to "")
This is the code..
<script type="text/javascript">
function change(text)
{
//document.forms["f1"].elements["ta"].value="Hi!";
//document.f1.ta.value="Hi!";
document.getElementById("msg").innerHTML='<h2 class="hmsg">'+text+'</h2>';
}
function getText()
{
return document.getElementById("ta").value;
}
function all()
{
change(getText())
}
</script>
<form name="f1">
<input type="text" value="Enter your message here!" id="ta"/>
<input type="button" value=" " onclick='all()'/>
</form>
Perhaps you can clarify what is not working as you expect. I expanded your code into a working example:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<title>Test</title>
</head>
<body>
<script type="text/javascript">
function change(text)
{
document.getElementById("msg").innerHTML='<h2 class="hmsg">'+text+'</h2>';
}
function getText()
{
return document.getElementById("ta").value;
}
function all()
{
change(getText())
}
</script>
<form action="#">
<div id="msg">
</div>
<div>
<input type="text" value="Enter your message here!" id="ta"/>
<input type="button" value=" " onclick='all()'/>
</div>
</form>
</body>
</html>
Changing the content of the <div> with id msg works here.