title: allowing tab key when we are allowing only numbers in textbox using java script
body: <p>i written a java script which allows only numbers,comma,dot. i applied it on four text boxes. my issue is i have 10 text boxes which takes different types of data on which four of them i applied java script. i can use tab key on other text boxes but i am not able to use on java script applied text boxes to move courser. is there any change that i have to do in my script... Thanks.</p>
  
  <p>Java Script:-</p>
  
  <pre><code>function isNumberCommaDot(evt) {
           var theEvent = evt || window.event;
           var key = theEvent.keyCode || theEvent.which;
           key = String.fromCharCode(key);
           if (key.length == 0) return;
           var regex = /^[0-9,\9\b]*\.?[0-9]*$/;
           if (!regex.test(key)) {
               theEvent.returnValue = false;
               if (theEvent.preventDefault) theEvent.preventDefault();
           }
       }
  </code></pre>
  
  <p>i used \9 in regex but still its not accepting tab key.(9 is ASCII char. for TAB Key)</p>