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;
}
{
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;
}
document.onkeydown=funKeyDown;
function funKeyDown(){
if ((event.ctrlKey)&&(event.keyCode==78)){ //屏蔽 Ctrl+n
event.returnValue=false;
}
}
</script>