java script for validation

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how can i give validation for text box. it should have only numbers using java script

Posted 2-Jul-12 17:22pm

durga.r

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Prasad_Kulkarni · Answer 1 · 2012-07-02T18:08:00

Try this:

HTML

<HTML>
   <HEAD>
   <SCRIPT language=Javascript>
      <!--
      function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57))
            return false;

         return true;
      }
      //-->
   </SCRIPT>
   </HEAD>
   <BODY>
      <INPUT id="txtChar" onkeypress="return isNumberKey(event)" type="text" name="txtChar">
   </BODY>
</HTML>

Refer:
Allow Only Numbers in a Textbox[^]
Similar discussion: Restricting input to textbox: allowing only numbers and decimal point[^]

Abhinav S · Answer 2 · 2012-07-02T17:27:00

Solution 1

I found a number of links once I did a search on the internet -
Number Validation and Formatting using Javascript[^]
http://www.dzone.com/snippets/javascript-numeric-validation[^]
http://www.java2s.com/Code/JavaScript/Form-Control/Validateanumber.htm[^]

Posted 2-Jul-12 17:27pm

Abhinav S

Prosan · Answer 3 · 2012-07-02T19:07:00

Solution 4

look this tips in which i use javascript function for only take numeric values. this function also accept only one '.' and + or - sign. How to Add and Use Javascript Files's Functions in DLL[^]

Posted 2-Jul-12 19:07pm

Prosan