I have a form in which there is one text field is provided with a submit button.On clicking submit button,it redirects to second php page from first php page.
index.php
<form action="submit.php" method="get">
<input type="text" name="search" id="search" />
<input type="submit" value="submit" onclick="convert()" />
</form
<script type="text/javascript">
function convert()
{
alert("hi");
var str ;
str = document.getElementById("search").value;
document.writeln(str.toLowerCase());
}
</script>
On submitting the form,i want the url to become like submit.php?search=text
I want this text to be in lower case,although if text entered is uppercase.
Please guide me how to make this text lower case,I am using the above script for converting it to lower case.But its not converting the text in lower case in URL.
Please guide me on this..
There was a few errors, you were missing the right angle bracket on </form> and you were trying to write the value rather than setting the field value, try this...
<form action="submit.php" method="get">
<input type="text" name="search" id="search" />
<input type="submit" value="submit" onclick="convert();" />
</form>
<script type="text/javascript">
function convert() {
alert("hi");
var str;
var srch=document.getElementById("search");
str = srch.value;
srch.value=str.toLowerCase();
}
</script>
You can do this only using javascript with a few extra stuff:
1) Give your <form> an id
<form action="submit.php" method="get" id="form1">
2) Make your <input> type as button. The reason for this is because we want to make sure the convert() function is executed first, and after that we will submit the form.
<input type="button" value="submit" onclick="convert()" />
3) Finally javascript to:
function convert()
{
alert("hi");
var str ;
str = document.getElementById("search");
str.value = (str.value.toLowerCase());
//get the form id and submit it
var form = document.getElementById("form1");
form.submit();
}
Fiddle
You are use form element so you can get any elements inside form element access by name, Here Our form name is form1 and inside this form inputbox name="search" and access this value by this way, document.form1.search.value.toLowerCase();
Check this Demo jsFiddle
JavaScript
function convert() {
alert("hi");
var str = document.form1.search.value.toLowerCase();
document.writeln(str);
//console.log(str);
}
HTML
<form name="form1" method="get">
<input type="text" name="search" id="search" />
<input type="submit" value="submit" onclick="convert();" />
</form >
try like this:
alert("hi");
document.getElementById("search").value = document.getElementById("search").value.toLowerCase();
return true;
Fiddle Live
Related
Friends,
Plz check out my code and tell me why am not getting the result if I use form tag.
When I remove the form tag, I get the result. why can't I get the expected result if I use form tag ? Your suggestions can help me understand this better !! thank u ..
CODE :
<html>
<head>
<title>ADDITION OF 2 NOS</title>
<script type="text/javascript">
function add() {
var x=document.getElementById("value1").value;
var y=document.getElementById("value2").value;
var z=x+y;
document.getElementById("result").innerHTML=z;
}
</script>
</head>
<body>
<center>
<form name="form1" id="form1_id">
ENTER NO 1 : <input type="text" name="value1" id="value1"><br>
ENTER NO 2 : <input type="text" name="value2" id="value2"><br>
<input type="submit" value="SUBMIT" onclick="add()">
<p id="result"></p>
</form>
</center>
</body>
</html>
You need numerical values. document.getElementById("value1").value returns a string.
var x = +document.getElementById("value1").value;
// ^ cast to number
To prevent submitting, you need to include
<form onsubmit="return false;">
as well.
function add() {
var x = +document.getElementById("value1").value;
var y = +document.getElementById("value2").value;
var z = x + y;
document.getElementById("result").innerHTML = z;
}
<form name="form1" id="form1_id" onsubmit="return false;">
ENTER NO 1 : <input type="text" name="value1" id="value1"><br>
ENTER NO 2 : <input type="text" name="value2" id="value2"><br>
<input type="submit" value="SUBMIT" onclick="add()">
<p id="result"></p>
</form>
First of all, your submit element is causing the form to submit. It does the add() then submits the form. To prevent that, use onsubmit="return false;" like so:
<script type="text/javascript">
function add()
{
var x=document.getElementById("value1").value;
var y=document.getElementById("value2").value;
var z=x+y;
document.getElementById("result").innerHTML=z;
}
</script>
<body>
<center>
<form name="form1" id="form1_id" onsubmit="return false;">
ENTER NO 1 : <input type="text" name="value1" id="value1"><br>
ENTER NO 2 : <input type="text" name="value2" id="value2"><br>
<input type="submit" value="SUBMIT" onclick="add()">
<p id="result"></p>
</form>
Second of all, you're doing concatenation in your add() function. If you want to really add the numbers, use
var z = parseInt(x) + parseInt(y);
in your add() function. If you expect decimals use parseFloat() instead.
Okay, when that submit button is clicked and it's present in one (or more) form(s) a redirect happens. This redirect happens because the form will be submitted after that click.
So, to stop this redirect you need to prevent the default action of the browser to this form at its submit event, e.g., give it a callback, then return exact false at this function, or call [Event]#preventDefault.
form1 = document.form1
var form1
form1.addEventListener('submit', function (event) {
event.preventDefault()
}, false)
Done. Note: your sum actually concatenates strings. I'd also note that the HTMLFormElement#submit method wouldn't trigger this submit event, and that's good.
I currently have a button in HTML with the following code:
<form id="tfnewsearch" method="get" >
<input type="text" id="search_query" name="q" size="21" maxlength="120"><input type="button" id="search_button" name="search" value = "Search"onclick="doSearch(this.form.q)">
</form>
The function 'doSearch()' works only if I click the submit button. What changes do I have to do if it has to work even if I just press the Enter key?
<form id="tfnewsearch" method="get" onsubmit="doSearch()" >
Simply change the onclick to an onsubmit and attach it to your form!
The proper way it to move it to simple JS script
<script type="text/javascript">
var form = document.querySelector('#tfnewsearch'),
query = form.querySelector('[name="q"]');
form.addEventListener('submit', function(){
doSearch(query.value);
});
</script>
I have a form in which there is one text field and ine submit button.on click of submit button,it goes to next PHP page.The user can enter text in the text field.The text field can contain n number of text string separated by space.like a user enters text as
MY name is peter
I want text to change as MY-name-is-peter in url.
when user clicks on submit button.the url should become like submit.php?search=MY-name-is-peter
<form action="submit.php" method="get">
<input type="text" name="search" id="search">
<input type="submit" name="submit" value="submit">
</form>
PLease guide on how to add hyphen in the strings in url.
<script>
var handler = function (element) {
element.form.search.value = element.form.search.value.replace(/ /g, '-');
};
</script>
<form action="" method="get">
<input type="text" name="search" id="search" />
<input type="submit" onclick="handler(this);" name="submit" value="submit" />
</form>
str_replace will work or if you want to use regex you can try preg_replace("/[-]/", " ", $yourString)
You should encode URL before submit it:
$('form').submit(function(){
var val = $(this).find('#search').val();
$(this).attr('action','submit.php'+encodeURI(val))
})
Example : http://jsfiddle.net/e3L3a/
I have a simple form, with one issue.
In explorer, if nothing is inserted, the placeholder is passed as input of the field.
Here is JSbin: http://jsbin.com/EvohEkO/1/
I would like to make a simple comparision, when form is submitted, to check if the value of the field is equal to "First name", and if yes make the value empty ""
Just this i need.
Someone can help me please?
<form onsubmit="return checkform()">
<input name="test" placeholder="placeholdertext" id="test" />
<input type="submit" value="submitbutton"/>
</form>
in js
you should import jquery latest version this is the link: http://code.jquery.com/jquery-1.10.2.min.js
function checkform(){
var fieldvalue = $.trim($('#test').val());
if(!fieldvalue || fieldvalue=="placeholdertext"){
alert('there is no input');
return false;
}else{
alert('enjoy your form!');
return true;
}
}
This is somewhat easier..
$(document).ready(function(){
$("#form").submit(function(){
$('#form input:text, textarea').each(function() {
if($(this).val()==$(this).attr('placeholder'))
$(this).val(" ");
});
});
});
Just put your field value in hidden type input like this :-
<input id="hdnfield" name="hdnfield" value="<Your Field Value>" />
To check the value of a form field use the val() function on the input element
var input_value = jQuery('Input Element Selector').val();
As I looked to your form, the elements do not have any id attribute, I recommend that you add one to each of them, also change the submit input to button the you have more control on the javascript. so your form will look like :
<form id="form" action="form.php" method="post">
<input id="fname" type="text" placeholder="First name" name="fname"><br>
<label for="fname" id="fnamelabel"></label>
<input id="lname"type="text" placeholder="Last name" name="lname"><br>
<textarea id="message" placeholder="Contact us!" cols="30" rows="5" name="message"></textarea><br>
<br>
<input type="button" value="Submit">
</form>
so your jQuery will look like:
jQuery(document).ready(function(){
jQuery('input[type="button"]').click(function(){
var fname = jQuery('#fname').val();
var lname = jQuery('#lname').val();
var message = jQuery('#message').val();
...... Do whatever you need & then change the input values
...... if all validation has passed the use jQuery('#form').submit(); to submit the form otherwise reset the form:
jQuery('#fname').val("");
jQuery('#lname').val("");
jQuery('#message').val("");
});
});
here is a working version:
jsfiddle working link
You can do it like the following!
<form>
<input type="text" id="first_name" name="first_name"/>
<input type="submit" id="submit" value="submit"/>
</form>
<script type="type/javascript"/>
jQuery.noConflict();
(function ($) {
$(function () {
$("#submit").click(function () {
if ($("#first_name").val() == "first name") {
$(this).val("");
}
});
});
})(jQuery);
</script>
I've got this onclick call:
onClick="mySubmit();
which calls this function:
function mySubmit(){
document.getElementById("myForm").submit();
}
which then submits this form:
<form id="myForm" action="action.php" method="post">
My question is: how do I send a variable to the form from the onClick to get something like <form id="myForm" action="action.php?id=**(the variable sent from the onclick goes here)**" method="post">
Thanks!
Easiest way: append a hidden field to the form.
<form id="myForm" action="action.php" method="post">
<input type='hidden' id= 'hiddenField' name='id' value='' />
<script>
function mySubmit() {
document.getElementById('hiddenField').value = "Whatever I want here";
document.getElementById("myForm").submit();
}
</script>
Or use a function like
function addHiddenField(form, props) {
Object.keys(props).forEach(fieldName => {
var field = form[fieldName];
if (!field) {
field = document.createElement('input');
field.type = 'hidden';
field.name = fieldName;
form.appendChild(field);
}
field.value = props[fieldName];
});
}
document.querySelector('form').addEventListener('submit', () => {
addHiddenField(this, {
someQueryName: 'someQueryValue',
otherQueryName: 'otherVal'
});
});
<form>
Name
<input name=name />
<input type=submit />
</form>
Note that you can use DevTools to modify the iframe's sandbox to allow it to submit forms and you can verify the posted URL. sandbox="... allow-forms"
place a input type hidden inside the form then submit the form
<input id="id" name="id" type="hidden" />
set the value of the hidden field in your javascript submit()
document.getElementById('id').value = **;
but by setting form method="post" the id will not be the part of query string, i.e. the url will remain action.php
instead
if you really want the id in query string i.e. url action.php?id=** then you need to change the form method="get", by this the hidden field id will automatically be the part of the url i.e action.php?id=**
read about difference between get and post
here is how you access posted value on next page if you really need to use method="post" action="action.php"
Your HTML :
<form id="myForm" action="#" method="post">
<input type='hidden' id="id" name='id' value='123' />
<input type='submit' name='submit' value='Click me !' onclick='addParam()' />
</form>
Your Script :
function addParam() {
var url = "action.php?id=" + document.getElementById('id').value;
document.getElementById("myForm").setAttribute('action', url);
}
Thank You.