Entry
How can I cancel a key press?
Can I filter out particular keys in text field/text area input?
Feb 17th, 2000 18:28
Martin Honnen,
NN4 and IE5 allow to cancel key presses by returning false in the
onkeydown event handler; you can use that to filter out numerical keys
for example:
<SCRIPT>
function validateNonNumber (evt) {
var keyCode = evt.which ? evt.which : evt.keyCode;
return keyCode < '0'.charCodeAt() || keyCode > '9'.charCodeAt();
}
</SCRIPT>
</HEAD>
<BODY>
<FORM NAME="aForm">
<INPUT TYPE="text" NAME="field"
ONKEYDOWN="return false"
>
<BR>
<INPUT TYPE="text" NAME="aField"
ONKEYDOWN="return validateNonNumber(event)"
>
</FORM>
