Question

I have a 3 input fields. 2 for values and one fild for result.

    <input type="text" value="" id="name">
    <input type="text" value="" id="surn">

    <input type="text" value="" id="result">

In the results of the first two zancheniya fields must be joined.
For example

1 – John

2 – Smith

3 (result) John Smith

I have solution for one field http://jsfiddle.net/LvZdL/1/

  $("input#name").keyup(function () {
      var name  = $(this).val();
      $("input#result").val(name);
  }).keyup();

Answer 1

Try –

$("input#name,input#surn").keyup(function () {
      var name  = $("input#name").val();
      var surname  = $("input#surn").val();
      $("input#result").val(name + ' ' + surname);
  }).keyup();

Demo – http://jsfiddle.net/fx256/1/