Test Page

Input type submit action javascript

elements of type submit are rendered as buttons. When the click event occurs (typically because the user clicked the button), the user agent attempts to submit the form to the server.

Value

An element’s value attribute contains a string which is displayed as the button’s label. Buttons do not have a true value otherwise.

Setting the value attribute

input type="submit" value="Send Request" /> 

Omitting the value attribute

If you don’t specify a value , the button will have a default label, chosen by the user agent. This label is likely to be something along the lines of «Submit» or «Submit Query.» Here’s an example of a submit button with a default label in your browser:

Additional attributes

formaction

A string indicating the URL to which to submit the data. This takes precedence over the action attribute on the element that owns the .

This attribute is also available on and elements.

formenctype

A string that identifies the encoding method to use when submitting the form data to the server. There are three permitted values:

This, the default value, sends the form data as a string after URL encoding the text using an algorithm such as encodeURI() .

Uses the FormData API to manage the data, allowing for files to be submitted to the server. You must use this encoding type if your form includes any elements of type file ( ).

Plain text; mostly useful only for debugging, so you can easily see the data that’s to be submitted.

If specified, the value of the formenctype attribute overrides the owning form’s action attribute.

This attribute is also available on and elements.

formmethod

A string indicating the HTTP method to use when submitting the form’s data; this value overrides any method attribute given on the owning form. Permitted values are:

A URL is constructed by starting with the URL given by the formaction or action attribute, appending a question mark («?») character, then appending the form’s data, encoded as described by formenctype or the form’s enctype attribute. This URL is then sent to the server using an HTTP get request. This method works well for simple forms that contain only ASCII characters and have no side effects. This is the default value.

The form’s data is included in the body of the request that is sent to the URL given by the formaction or action attribute using an HTTP post method. This method supports complex data and file attachments.

This method is used to indicate that the button closes the dialog with which the input is associated, and does not transmit the form data at all.

This attribute is also available on and elements.

formnovalidate

A Boolean attribute which, if present, specifies that the form should not be validated before submission to the server. This overrides the value of the novalidate attribute on the element’s owning form.

This attribute is also available on and elements.

formtarget

A string which specifies a name or keyword that indicates where to display the response received after submitting the form. The string must be the name of a browsing context (that is, a tab, window, or ). A value specified here overrides any target given by the target attribute on the that owns this input.

In addition to the actual names of tabs, windows, or inline frames, there are a few special keywords that can be used:

Loads the response into the same browsing context as the one that contains the form. This will replace the current document with the received data. This is the default value used if none is specified.

Loads the response into a new, unnamed, browsing context. This is typically a new tab in the same window as the current document, but may differ depending on the configuration of the user agent.

Loads the response into the parent browsing context of the current one. If there is no parent context, this behaves the same as _self .

Loads the response into the top-level browsing context; this is the browsing context that is the topmost ancestor of the current context. If the current context is the topmost context, this behaves the same as _self .

This attribute is also available on and elements.

Using submit buttons

buttons are used to submit forms. If you want to create a custom button and then customize the behavior using JavaScript, you need to use , or better still, a element.

A simple submit button

We’ll begin by creating a form with a simple submit button:

form> div> label for="example">Let's submit some textlabel> input id="example" type="text" name="text" /> div> div> input type="submit" value="Send" /> div> form> 

Try entering some text into the text field, and then submitting the form.

Upon submitting, the data name/value pair gets sent to the server. In this instance, the string will be text=usertext , where «usertext» is the text entered by the user, encoded to preserve special characters. Where and how the data is submitted depends on the configuration of the ; see Sending form data for more details.

Adding a keyboard shortcut to a submit button

Keyboard shortcuts, also known as access keys and keyboard equivalents, let the user trigger a button using a key or combination of keys on the keyboard. To add a keyboard shortcut to a submit button — just as you would with any for which it makes sense — you use the accesskey global attribute.

In this example, s is specified as the access key (you’ll need to press s plus the particular modifier keys for your browser/OS combination). In order to avoid conflicts with the user agent’s own keyboard shortcuts, different modifier keys are used for access keys than for other shortcuts on the host computer. See accesskey for further details.

Here’s the previous example with the s access key added:

form> div> label for="example">Let's submit some textlabel> input id="example" type="text" name="text" /> div> div> input type="submit" value="Send" accesskey="s" /> div> form> 

For example, in Firefox for Mac, pressing Control — Option — S triggers the Send button, while Chrome on Windows uses Alt + S .

The problem with the above example is that the user will not know what the access key is! This is especially true since the modifiers are typically non-standard to avoid conflicts. When building a site, be sure to provide this information in a way that doesn’t interfere with the site design (for example by providing an easily accessible link that points to information on what the site access keys are). Adding a tooltip to the button (using the title attribute) can also help, although it’s not a complete solution for accessibility purposes.

Disabling and enabling a submit button

To disable a submit button, specify the disabled attribute on it, like so:

input type="submit" value="Send" disabled /> 

You can enable and disable buttons at run time by setting disabled to true or false ; in JavaScript this looks like btn.disabled = true or btn.disabled = false .

Validation

Submit buttons don’t participate in constraint validation; they have no real value to be constrained.

Examples

We’ve included simple examples above. There isn’t really anything more to say about submit buttons. There’s a reason this kind of control is sometimes called a «simple button.»

Technical Summary

Specifications

Browser compatibility

BCD tables only load in the browser

See also

Found a content problem with this page?

This page was last modified on Apr 12, 2023 by MDN contributors.

Your blueprint for a better internet.

MDN

Support

Our communities

Developers

Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation.
Portions of this content are ©1998– 2023 by individual mozilla.org contributors. Content available under a Creative Commons license.

Источник

How can I set the form action through JavaScript?

I have an HTML form whose action should be set dynamically through JavaScript. How do I do it? Here is what I am trying to achieve:

8 Answers 8

You cannot invoke JavaScript functions in standard HTML attributes other than onXXX . Just assign it during window onload.

 window.onload = function() < document.myform.action = get_action(); >function get_action() 
.
 

You see that I’ve given the form a name , so that it’s easily accessible in document .

Alternatively, you can also do it during submit event:

Although, depending on markup this may not validate, the ‘name’ attribute is not a valid attribute in XML, its better to use an ID and use the getElementById

@Rabbott: It’s HTML, not XML. XHTML is only interesting for server-side HTML-autogenerators like componentbased MVC frameworks.

document.getElementById('form_id').action; //Will retrieve it document.getElementById('form_id').action = "script.php"; //Will set it 

$("#form_id").attr("action"); //Will retrieve it $("#form_id").attr("action", "/script.php"); //Will set it 

Hi, I think for plain JavaScript line 2: document.getElementById(‘form_id’).action = «script.php» will retrieve it

It was a nice option, I used the Plain Javascript Option. I worked in the desktop view. But not getting that worked with mobile browsers

Very easy solution with jQuery:

$('#myFormId').attr('action', 'myNewActionTarget.html'); 

Actually, when we want this, we want to change the action depending on which submit button we press.

Here you do not need even assign name or id to the form. Just use the form property of the clicked element:

Change the action URL of a form:

  
Try it 
  

. assuming it is the first form on the page.

this might work, but i am still trying to make it work by getting the action string from a function. is there no way to do it like that?

You can write it in an onsubmit event handler to make sure it always gets just just before submission. However, in general trying to change a form action from script is a code smell; unless you don’t control the server side, it’s usually better to make the form accept two+ different submission modes.

Источник

HTML form do some «action» when hit submit button

I would like to learn about HTML forms. For example, I have 2 input text fields for first name and last name and a submit button. When the submit button is clicked, I would like the webpage to display something like: Your Name is «First Name» «Last Name».

What do I need to have here in order to have some «action» when I click that button? Edit: Ok now I figure out that I need either PHP or JavaScript here. Can some one suggest or provide a sample code of PHP or Js as a reference for me?

2 Answers 2

Ok, I’ll take a stab at this. If you want to work with PHP, you will need to install and configure both PHP and a webserver on your machine. This article might get you started: PHP Manual: Installation on Windows systems

Once you have your environment setup, you can start working with webforms. Directly From the article: Processing form data with PHP:

For this example you will need to create two pages. On the first page we will create a simple HTML form to collect some data. Here is an example:

    
Data Collection
 
 
 
 
Name:
 
 
 
Age:
 
 
 
 
 
 
 
 
   

This page will send the Name and Age data to the page process.php. Now lets create process.php to use the data from the HTML form we made:

"; print "You are ". $Age . " years old"; print "
"; $old = 25 + $Age; print "In 25 years you will be " . $old . " years old"; ?> 

As you may be aware, if you leave out the method=»post» part of the form, the URL with show the data. For example if your name is Bill Jones and you are 35 years old, our process.php page will display as http://yoursite.com/process.php?Name=Bill+Jones&Age=35 If you want, you can manually change the URL in this way and the output will change accordingly.

Additional JavaScript Example

This single file example takes the html from your question and ties the onSubmit event of the form to a JavaScript function that pulls the values of the 2 textboxes and displays them in an alert box.

Note: document.getElementById(«fname»).value gets the object with the ID tag that equals fname and then pulls it’s value — which in this case is the text in the First Name textbox.

    function ExampleJS()  
First name:  
Last name:  
 
   

Источник