title: Find number of element in string with jQuery
body: <p>I have a function, this function receive a string in argument. The content of this variable is HTML code. I'd like know number of HTML element with the class <code>.myClass</code></p>
  
  <pre><code>function MyTest(myData){
      //get how many element with .myClass are in myData
  }
  </code></pre>
  
  <p>Thanks,</p>