Good examples

Remove non permitted characters from an input box as user types

    function VerifyProfileText() {
      var a = document.getElementById("Nickname").value;
      a = a.replace(/[^a-zA-Z ]/g, '');   //Permit a to z, AtoZ and space only
      document.getElementById("Nickname").value = a;

<input type="text" id="MyNickname" name="Nickname" maxlength="20" value="$Nickname" onkeyup="VerifyProfileText();" paste="VerifyProfileText();" >
Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.


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