捕捉按键的兼容代码
时间：2011-01-07 来源：toxot
function keydown(event)
{
if ( !event )
event = window.event;
var keycode = event.KeyCode | event.Which;
alert(keycode);
}
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时间：2011-01-07 来源：toxot
function keydown(event)
{
if ( !event )
event = window.event;
var keycode = event.KeyCode | event.Which;
alert(keycode);
}
