Auto populate field base on what was entered in another field simultaneously

Question

I was trying to figure out how to auto-populate the input value base on what was entered in another input field using javascript. Here\'s my code:

Answer 1

I made a general example :

HTML

<input type="text" class="first">
<input type="text" class="second">

javascript

$(".first").on('keyup',function(){
    $(".second").val($(this).val());
});

http://jsfiddle.net/fmdwv/1/

For your purpose :

$("#address").on('change', function(){
  $("#shipping-address-1").val($(this).val());
});

Answer 2

Create simple html file with two input text box. The first input text box will take the input from the user about a date format and second input text box will display the current date on this format. After the completion of first step, implement date selection library to select a date and format it according to the user input given in first input text b

Answer 3

The onchange event should be used in the <input> tags themselves and not in the <form>.

Answer 4

I made a js fiddle based on what you're asking for.

HTML

Home Address:
<input id="address" name="address" type="text" />
<br/>Apt or Suite Number:
<input id="suite" name="suite" type="text" />
<br/>City/Town:
<input id="city" name="city" type="text" />
<br/>State:
<select id="state" name="state" value="">
    <option value="AL">Alabama</option>
    <option value="AK">Alaska</option>
</select>
<br/>Zip:
<input id="zip" name="zip" type="text" value="" />
<br/>
<p>Select Shipping Address Below:</p>
<input type="checkbox" id="shipping-address-1" name="address1" value="">
<label for="shipping-address-1" id="shiadd1">(Print auto-populated shipping address here...)</label>
<input type="checkbox" id="shipping-address-2" name="address2" value="">
<label for="shipping-address-2">ABC Corp 123 Main Street, My City, State Zip</label>

JavaScript

$("#address,#suite,#city,#state,#zip").change(function () {
    var addressArray = [$("#address").val(), $("#suite").val(), $("#city").val(), $("#state").val(), $("#zip").val()];
    $("#shiadd1").text(addressArray.join(' '));
});