title: Limit the input entered in ExtJs textfield/numberfield
body: <p>I have requirement where the <code>textfield/numberfield</code> present should only allow values between <code>0 to 99999.99</code> i.e. 5 digits with 2 decimal places.</p>
  
  <p>The user should be restricted to use any invalid number.</p>
  
  <p>I'm bad at regular expression but will that solve my problem ?
  Any pointer to solve this issue will be appreciated.</p>
  
  <p>I need to restrict user to enter any values beyond 5 digit. after 5 digit only a decimal can be placed and beyond that 2 digits</p>
  
  <p>Any suggestions ?</p>