alt+tab不可以屏蔽的alt+left alt+right可以
<body>
<script type="text/javascript">
function document.body.onkeydown()
{
var a = event.altKey;
var l = event.keyCode==37;
var r = event.keyCode==39;
var q = (a&&l)||(a&&r);
return !q;
}
</script>
<body>
<script type="text/javascript">
function document.body.onkeydown()
{
var a = event.altKey;
var l = event.keyCode==37;
var r = event.keyCode==39;
var q = (a&&l)||(a&&r);
return !q;
}
</script>
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