title: Regular expression in jsp
body: <p>I need a regular expression which accepts both alphanumeric and also alphabets but not numerics alone, and special characters allowed are .(dot) and _(underscore).</p>
  
  <p>Valid entries are  </p>
  
  <p>1.ABC123de (alphanumeric- irrespective of the case)<br>
     2.   ABCDEfgh (only alphabets – irrespective of the case)<br>
     3.   Abc_.123 (only special characters allowed are _ and .)</p>
  
  <p>Invalid entry:<code>666666</code>(numeric alone)</p>
  
  <p>Thanks,
  Balaji</p>