[form-submit] Values of disabled inputs will not be submitted

This is what I found by Firebug in Firefox.

Is it the same in other browsers?

If so, what's the reason for this?

disabled input will not submit data.

Use the readonly attribute:

<input type="text" readonly />

Source here

They don't get submitted, because that's what it says in the W3C specification.

17.13.2 Successful controls

A successful control is "valid" for submission. [snip]

• Controls that are disabled cannot be successful.

In other words, the specification says that controls that are disabled are considered invalid and should not be submitted.

select controls are still clickable even on readonly attrib

if you want to still disable the control but you want its value posted. You might consider creating a hidden field. with the same value as your control.

then create a jquery, on select change

$('#your_select_id').change(function () {
    $('#your_hidden_selectid').val($('#your_select_id').val());
});

You can use three things to mimic disabled:

1. HTML: readonly attribute (so that the value present in input can be used on form submission. Also the user can't change the input value)

2. CSS: 'pointer-events':'none' (blocking the user from clicking the input)

3. HTML: tabindex="-1" (blocking the user to navigate to the input from the keyboard)

Disabled controls cannot be successful, and a successful control is "valid" for submission. This is the reason why disabled controls don't submit with the form.

There are two attributes, namely readonly and disabled, that can make a semi-read-only input. But there is a tiny difference between them.

<input type="text" readonly />
<input type="text" disabled />

• The readonly attribute makes your input text disabled, and users are not able to change it anymore.
• Not only will the disabled attribute make your input-text disabled(unchangeable) but also cannot it be submitted.

jQuery approach (1):

$("#inputID").prop("readonly", true);
$("#inputID").prop("disabled", true);

jQuery approach (2):

$("#inputID").attr("readonly","readonly");
$("#inputID").attr("disabled", "disabled");

JavaScript approach:

document.getElementById("inputID").readOnly = true;
document.getElementById("inputID").disabled = true;

PS disabled and readonly are standard html attributes. prop introduced with jQuery 1.6.