I believe you can only cancel onkeypress not onkeydownto block "a", try<script language="javascript">
function pr(evt) {
if (evt.which == 97)
return false;
}document.onkeypress= pr;
document.captureEvents(Event.KEYDOWN|Event.KEYUP);
</script>
function pr(evt) {
if (evt.which == 97)
return false;
}document.onkeypress= pr;
document.captureEvents(Event.KEYDOWN|Event.KEYUP);
</script>
解决方案 »
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