title: Prototype make option in select be selected by provided value
body: <p></p>
  
  <p>populated by options (country list) using Protype:</p>
  
  <pre><code>for (var i = 0; i &lt; j.length; ++i) {
              var opt = new Element('option', {value:j[i].country})
              opt.innerHTML = j[i].country_name;            
              country.appendChild(opt);
  }
  </code></pre>
  
  <p>now i need to make option to be selected by value, somethhing like</p>
  
  <pre><code>function selectByValue(countryCode) {
     // make option selected where option value == countryCode
  }
  </code></pre>
  
  <p>how to do it with Prototype?</p>