使用jQuery和Select选项是否可能？

Question

I have a list of countries and their area codes in a database. I am trying to auto update a text field with the countries area code when a select option is selected.

ex.

<select name="country">
    <option value="CA" code="+1">Canada</option>
    ...
</select>

<input type="text" name="phone" />

I need to pass on to the script the value CA and the users need to see Canada. Basically what I'm asking is can I create a new option code and have jQuery update the text field that I choose to it.

Is this possible to do? or is there another way I can accomplish this?

Edit: "code" is supposed to be the country's area code. So when a user selects Canada for example the text field phone gets updated with +1. I know I can just set value to +1 and then use .change() to update phone 's .val() but I need the current value to pass on to the script that processes it.

Answer 1

I suggest you use an HTML5 data- attribute instead of a custom attribute:

<select name="country">
    <option value="CA" data-code="+1">Canada</option>
    ...
</select>

<input type="text" name="phone" />

and then bind a handler to the change event:

$('select[name="country"]').change(function() {
    $('input[name="phone"]').val($(this).children('option:selected').data('code'));
});

or with less jQuery:

$('select[name="country"]').change(function() {
    $('input[name="phone"]').val(this.options[this.selectedIndex].getAttribute('data-code'));
});

Another option would be to have a country -> code map in JavaScript

var map = {
    'CA': '+1',
    ...
};

and then look up the code.

Answer 2

Be sure to assign each element an id.

var code = $('#country option:selected').attr('code');
$('#phone').val(code);

If "code" doesn't work. Use "title".

Answer 3

Not entirely sure what you're asking, but dos this help?

$('select[name=country]').change(function() {

    $('input[name=phone]').val($(this).find('option:selected').attr('code'));

    alert('Do something else with this: ' + $(this).val());
});

Answer 4

$("select[name='country']").change(function() {
    $("input[name='phone']").val($(this).find('option:selected'));
});

You can try this. It ties into the select menus change event and then gets the "code" attribute value and sets the text of the input to it.