title: Using Regular Expression for Phone Number
body: <p>I know this question is asked like a thousand times in here, but I can't get the hang of it yet. I need help with checking a textbox if it matches a Phone Number format. The format should be likes this :</p>
  
  <p><code>000-000-000</code> or <code>(+000)00-000-000</code>. Can anybody help me ?</p>