I want to get value of input element using javaScript.
I am new to all this Please help me.
You can use
var stringVal = document.getElementById('youInputID').value;
Other users have answered the question above already. I would also like to recommend looking at one of the javascript libraries. They make this kind of work much easier. My current favorite is jquery. It is amazingly powerful - every day I find some new feature or trick that makes javascript programming easier.
To solve this in jquery you can use:
The line below will create an alert box for the value of an input tag with the id of email using jquery:
alert($("#email").val());
Here is a complete example:
<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
alert($("#email").val());
});
</script>
</head>
<body>
<form method="POST" action="go.php" id="login_form">
<input type="text" class="inputtext" title="Email" id="email" name="email" value="your#emailaddress" />
</form>
</body>
</html>
Your Javascript should look similar to this:
var elm = document.getElementById('myElement');
var value = elm.value;
And your HTML:
<input type="text" id="myElement" value="My Value" />
Try this:
<input type="text" id="testid" value="" />
Now you can get the value of above text box like this:
document.getElementById('testid').value;
Other way:
document.form_name_here.element_name.value;
Simply run an alert to check if value comes:
alert(document.getElementById('testid').value);
var txt = document.getElementById('ID-OF-FIELD');
var value = txt.value;
Related
I really need help... :-) I have two html pages and forms on both of them. I need solution to show field value from first form (on first page) in field on second form, after click on SEND button. But, I need both pages to stay open, on first I need to insert values and on second page that values should be shown. Also, I need a solution without PHP because this app will be running on local devices, without server. I don't have any solution and please, I need some tips how I can do that.
I found here some solutions with localStorage and it looks interested but I need to stay on First page and send field value to Second page, in live. There is code which I found here, this is example what I need, just I need both pages to be open and after I insert some value in field on first page and click on button, that value should be shown in field on second page. Thank you in advance!
<html>
<head>
<title>First Page</title>
<script type="text/javascript">
function saveVal() {
var inputFirst = document.getElementById("name").value;
localStorage.setItem("name", inputFirst);
inputFirst = localStorage.getItem("name");
}
</script>
</head>
<body>
<form action="secondPage.html" method="get">
<label>
First Name:
<input name="name" size="20" maxlength="25" type="text" id="name" />
</label>
<input type="submit" value="submit" onclick="saveVal()"/>
</form>
</body>
</html>
<html>
<head>
<title>Second Page</title>
</head>
<body>
<form action="#">
<label>
First Name:
<input name="name" size="20" maxlength="25" type="text" id="name"
readonly="readonly" />
</label>
<script type="text/javascript">
var storedVal = document.getElementById("name");
storedVal.value = localStorage.getItem("name");
</script>
</form>
</body>
</html>
You can use setInterval to constantly check and set the value:
//this will run storeCheck function every 250 miliseconds and update values from localStorage.
setInterval(storeCheck, 250);
function storeCheck() {
var storedVal = document.getElementById("name");
storedVal.value = localStorage.getItem("name");
}
Im a beginner in Jquery / Javascript and have a problem getting a value in a variable after using .on (click).
I know it doesnt work after i start.on, but I want to know, how i can get my value (i hope you can follow me)
My Jquery looks like this:
$(function(){
$("body").on("click", "#main", function(event){
var test = $("#firstName").value;
alert(test);
});
});
My html page is very simple, but here it is:
<input type="text" value="HEY THERE" placeholder="Text" name="box" id="firstName">
<a id="main" href="#">Submit Text</a>
The javascript alert comes up with "undefined", so i think my script cant find my HTML element.
I hope you understand my problem,
Greets :)
You need to use:
var test = $("#firstName").val();
ID name should be unique, your code defined with the same ID name, you should replace
<input type="text" value="HEY THERE" placeholder="Text" name="box" id="main">
into this
<input type="text" value="HEY THERE" placeholder="Text" name="box" id="firstname">
and js should be
var test = $("#firstName").val();
First, you have the same id (main) for two different controls. I guess you need to change the id of the input text to firstName.
Then, you can either use pure javascript:
var test = document.getElementById("firstName").value;
or jquery:
var test = $("#firstName").val();
I am running the following Jquery:
<input type="text" value="hello" name="multy['helloworld']" />
<script type="text/javascript">
$(document).ready(function(){
var hello = 'helloworld';
alert($('input[name="multy['+hello+']"]').val());
})
</script>
As you'll see it can't select the element by a named Array key. Is there a work around for this?
Ta.
Antony
Yes, remove the single quotes from the name of the element:
<input type="text" value="hello" name="multy[helloworld]" />
They are absolutely not required.
You have to do double escapes on the brackets when you send it to jquery so jquery will know to escape them, too. Plus, please notice that I removed the single quote from the input in your example.
<input type="text" value="hello" name="multy[helloworld]" />
<script type="text/javascript">
alert($('input[name=multy\\[helloworld\\]]').val());
</script>
HTML:
<fieldset>
<p>
<label>SOME LABEL</label><span class="required"> *</span>
</p>
<input type="text" id="txtBox">
</fieldset>
Using jQuery i am trying to get "span.required" and add a class "missing" (changes color to red).
JQuery Code:
$('#txtBox').closest('fieldset').find('span.required').addClass('missing');
JQUERY CODE FOR required field validator in ASP.NET:
for (var i = 0; i < Page_Validators.length; i++) {
var val = Page_Validators[i];
var ctrl = document.getElementById(val.controltovalidate);
if (ctrl != null && ctrl.style != null) {
if (!val.isvalid) {
ctrl.closest('fieldset').find('span.required').addClass('missing');
}
else {
//alert('no error');
}
}
}
ERROR via Console: object [ctrl object - the textbox] has no method closest
i have tried different interations using "find" "parent" etc. but nothing i try seems to work.
What is wrong with my code? I cannot grab that span.required
Thank you to everyone's input, I have learned a lot from each of your input. EVERYONE's answer has valid and working code, however only the selected provided the solution.
First off, there are a couple of changes in your HTML that you should make which will not only help you solve this issue, but will also make for cleaner, more valid code:
Add a for attribute to all of your <label> tags that pairs them with the input that they match (this really should always be done with labels), and
Move the <span class="required"> *</span> inside the label (since it really is part of the label)
The resulting code would look like this:
<fieldset>
<p>
<label for="txtBox">SOME LABEL<span class="required"> *</span></label>
</p>
<input type="text" id="txtBox">
</fieldset>
Once you've done that, what you are trying to accomplish becomes much easier:
Instead of:
ctrl.closest('fieldset').find('span.required').addClass('missing');
. . . you can use the id of the input (val.controltovalidate) as part of a JQuery selector to find the related label directly:
var $targetLabel = $("label[for='" + val.controltovalidate +"']")
$targetLabel.find('span.required').addClass('missing');
I've used this many times to pair validations with the labels of the field that is being validated . . . quick and clean. :)
Edit: I split up the last JS piece to keep it from scrolling, but it could be one line. :)
Try txtbox.parent() instead.
txtbox.parent().find('span.required-field').addClass('missing')
$('span.required').addClass('missing');
Try this:
$(function(){
$('#txtBox').parent().find('span.required').addClass('missing');
});
Check http://jsfiddle.net/alaminopu/unZPZ/
Check this one out, I used both, closest() and parent().
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<style>
.missing{color:red;}
.required{color:blue;}
</style>
<script>
$(document).ready(function(){
$(function(){
$('#txtBox').parent().find("span.required").removeClass("required").addClass("missing");
//$('#txtBox').closest("fieldset").find("span.required").removeClass("required").addClass("missing");
});
});
</script>
</head>
<body>
<fieldset>
<p>
<label>Some Label</label> <span class="required"> *</span>
</p>
<input type="text" id="txtBox">
</fieldset>
</body>
</html>
http://jsfiddle.net/GdBnw/
HTH.
I have the following form which is getting pre populated with values on load. I want to have empty input boxes on load using Javascript. However I do not have access to the <body> tag so <body onload="" will not work here. Is there any other way to clear the form fields on load?
<form method="POST" action="">
<input name="username" id="user" value="" /><br />
<input name="pwd" id="pass" value="" />
<input type="submit" value="Go" />
</form>
You can use window.onload instead.
function init() {
// Clear forms here
document.getElementById("user").value = "";
}
window.onload = init;
You could also use one of the nice wrappers for doing this in JQuery, Dojo, or you favorite Javascript library. In JQuery it would be,
$(document).ready(init)
Try something like:
window.onload = function(){
document.getElementById("user").value = "";
}
Here's an example
You can run a timeout that will clear the field values. like this:
var t=setTimeout(function(){CLEARVALUES},3000)
Maybe you can add a script tag just after the form.
<script type="text/javascript">document.getElementById("user").value = "";</script>
You can also use jQuery to subscribe to both an individual element's ready (or load) event or the document.
onload=()=>{
document.getElementById('user').value='';
}
or
onload=()=>{
document.getElementById('user').setAttribute('value','');
}