title: JavaScript lastIndexOf()
body: <p>In C# I can do this</p>
  
  <pre><code>string ID = "ContentPlaceHolderDefault_MainSiteSectionArea_MyPagePlaceHolder_Item4_FavoritAmusementCalender_6_deleteRight_2";   
  ID = ID.Substring(ID.LastIndexOf("_") + 1); 
  </code></pre>
  
  <p>to return the last int <code>2</code></p>
  
  <p>How can I most easily do this in jQuery/JavaScript</p>
  
  <p>The id is created dynamic and can for now be up to 3 digit.</p>
  
  <p>Thanks in advance.</p>