title: Javascript - Variable in function name, possible?
body: <p>i hope this question is not too simple, but i have no idea :(</p>
  
  <p>How can i start a function with a var in the function name?</p>
  
  <p>For example ...</p>
  
  <p><strong>my functions</strong></p>
  
  <pre><code>function at_26();
  function at_21();
  function at_99();
  </code></pre>
  
  <p><strong>start the function</strong></p>
  
  <pre><code>var test_id = 21;   
  at_'+test_id+'();   // doesn't work
  </code></pre>
  
  <p>I hope somebody can help me.</p>
  
  <p>Thanks in advance!
  Peter</p>