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Q709 How can I remove invalid characters from a form field before submission?

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Q709 How can I remove invalid characters from a form field before submission?

Try:

<SCRIPT LANGUAGE="JavaScript"><!--
function validated(string) {
    for (var i=0, output='', valid="123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; i<string.length; i++)
       if (valid.indexOf(string.charAt(i)) != -1)
          output += string.charAt(i)
    return output;
} 
//--></SCRIPT>

<FORM>
<INPUT TYPE="TEXT" onChange="this.value=validated(this.value)">
</FORM>

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