/*ss: in form page- <form name="form" onSubmit="return ValidateInput(this)"> */


/* This script and many more are available free online at

The JavaScript Source :: http://javascript.internet.com

Created by: Manzi Olivier :: http://www.imanzi.com/ */

 

// calculate the ASCII code of the given character

function CalcKeyCode(aChar) {

  var character = aChar.substring(0,1);

  var code = aChar.charCodeAt(0);

  return code;

}

 

function checkNumber(val) {

  var strPass = val.value;

  var strLength = strPass.length;

  var lchar = val.value.charAt((strLength) - 1);

  var cCode = CalcKeyCode(lchar);

 

  /* Check if the keyed in character is a number

     do you want alphabetic UPPERCASE only ?

     or lower case only just check their respective

     codes and replace the 48 and 57 */

 

  if (cCode < 48 || cCode > 57 ) {

    var myNumber = val.value.substring(0, (strLength) - 1);

    val.value = myNumber;

  }

  return false;

}