title: How to validate allow minus(-) and only numbers in input textbox using Jquery?
body: <p>How to validate in an Amount input field?</p>
  
  <ol>
  <li><p>Allow minus (Negative) sign only once in the text box. For, eg, -10.00. Don't allow other special characters because it's an amount field.</p></li>
  <li><p>It should not allow alphabet letters. Allow only numbers.</p></li>
  <li><p>Decimal(.) should be only once in the text box.</p>
  
  <p></p></li>
  </ol>