js监听键盘方向键事件

<SCRIPT language=javascript>
document.onkeydown = chang_page;
function chang_page() {
if (event.keyCode == 37 || event.keyCode == 33) location = 'http://www.maitianquan.com';
if (event.keyCode == 39 || event.keyCode == 34) location = 'http://www.lanrentuku.com'
}
</SCRIPT>