How to not allow to type unicode characters?

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hi,
is there anyway to not allow users to type unicode characters for the name, last name, address of a user that is either in canada or USA. Please note than canada users can use French characters as well.
Thanks

Posted 20-Jun-11 5:23am

hemantwithu

Updated 20-Jun-11 5:36am

DaveAuld

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-06-20T06:20:00

Not using Unicode won't help you. (Also, there is not such thing as non-Unicode characters, but you probably need code point subset, something like ASCII, also may be not exactly what you need.) Decide what exactly You can filter out some characters.

Here is one code sample:

HTML

<html>
   <head>
      <script type="text/javascript"><!--
         function filterDigits(eventInstance) { 
            eventInstance = eventInstance || window.event;
                key = eventInstance.keyCode || eventInstance.which;
            if ((47 < key) && (key < 58) || key = 45 || key == 8) {
               return true;
            } else {
               if (eventInstance.preventDefault)
                  eventInstance.preventDefault();
               eventInstance.returnValue = false;
               return false;
            } //if
         } //filterDigits
      --></script>
   </head>
<body">

<input type="text" onkeypress="filterDigits(event)"/>

</body>
</html>

Pay attention: you also need to allow key code 8 (backspace).

—SA