title: Array value count javascript
body: <p>How can I count the array depending on the value..
  I have an array with this value..</p>
  
  <pre><code>var myArr = new Array(3);
  myArr[0] = "a";
  myArr[1] = "a";
  myArr[2] = "b";
  </code></pre>
  
  <p>I need to count the array depending on the value</p>
  
  <p>Array with Value A is 2
  Array with value B is 1</p>
  
  <p>Thanks!</p>