请问怎么调用function document.onkeydown()函数?
function document.onkeydown()
{
var k = window.event.keyCode;
if (k==122) //屏蔽F11
{
window.event.keyCode = 0;
window.event.returnValue= false;
}
if (window.event.ctrlKey && k == 78) //屏蔽 Ctrl+n
window.event.returnValue= false;
if (event.shiftKey && k==121) //屏蔽 shift+F10
window.event.returnValue= false;
}