title: Multiple Logical Operators in javascript
body: <p>I want to check the following</p>
  
  <p>1: Is x a number<br>
  2. If x is less that 5 or greater than 15, sound alert
  3. If all is ok, callMe() </p>
  
  <pre><code>var x = 10;
  if (isNaN(x) &amp;&amp; ((x &lt; 5) || (x &gt; 15))) {
  alert('not allowed')
  }
  else
  {
  callMe();
  }
  </code></pre>
  
  <p>What am I doing wrong?</p>