<script type="text/javascript">
document.onkeydown = function () {
document.body.innerHTML += event.keyCode + ":按下了<br \/>";
};document.onkeyup = function () {
document.body.innerHTML += event.keyCode + ":离开了<br \/>";
};
</script>
document.onkeydown = function () {
document.body.innerHTML += event.keyCode + ":按下了<br \/>";
};document.onkeyup = function () {
document.body.innerHTML += event.keyCode + ":离开了<br \/>";
};
</script>
(function () {
var a_data = [], o_data = {};
document.onkeydown = function () {
var e = window.event || arguments[0], k = e.keyCode || e.which;
if (!o_data[k]) {
o_data[(a_data[a_data.length] = k)] = true;
document.body.innerHTML += k + ":按下了<br \/>";
}
};
document.onkeyup = function () {
var i, e = window.event || arguments[0], k = e.keyCode || e.which;
for (i = 0 ; i < a_data.length ; i ++)
if (a_data[i] == k) a_data.splice(i, 1);
delete o_data[k];
document.body.innerHTML += k + ":离开了<br \/>";
};
})();
</script>
function keyup()
{
if (event.altKey && String.fromCharCode(event.keyCode) == "S")
{
alert("success!");
}
}这样就可以了 ,不过也谢谢你