title: convert C# regular expression to javascript
body: <p>This code is working for c#. when we are coming to java script it is not working.</p>
  
  <p>regular expression in c#. </p>
  
  <pre><code>string regExp ="^(?!(\d)\1+$)(?!(012345678901|123456789012|234567890123|345678901234|456789012345|567890123456|678901234567|789012345678|890123456789|901234567890)$)(?!\d{9}000$)\d{12}$"
  </code></pre>
  
  <p>Somebody help me how to convert this into JavaScript.<br>
  Please let me now any conversion tool is there.</p>