title: How to set global configuration in Magento?
body: <p>I am going to talking about some the config issue in Magento:</p>
  
  <p>Let me assume that:</p>
  
  <p>If I want to declare some global configuration in <strong><code>app/etc/config.xml</code></strong> for:</p>
  
  <blockquote>
    <p>I want to set delay time for refresh page as <strong>5000ms</strong>.</p>
  </blockquote>
  
  <p>In the code, I will try to get like below:</p>
  
  <pre><code>Mage::app()-&gt;getConfig()-&gt;getDelayTime();
  </code></pre>
  
  <h3>or</h3>
  
  <pre><code>Mage::app()-&gt;getConfig()-&gt;get('delaytime');
  </code></pre>
  
  <p>How should I do?</p>