JS Screen Keyboard is not available and the right mouse button is not available _javascript tips

2 small experiments were done today, shielding the keyboard is not available shielded mouse right button unavailable

Test one, the shielding keyboard is not available

There are 3 keyboard events

A, KeyDown: Press a key on the keyboard trigger, always hold down a key will continue to trigger

B, KeyPress: Press a key and generate characters when the trigger, that is, ignore Shift,alt,ctrl and other function keys

C, KeyUp: Trigger when releasing a key

Copy Code code as follows:

<script language= "JavaScript" >
function block () {
Event.keycode = 0;
Event.returnvalue = false;
Alert ("Keyboard unavailable.");
}
Document.onkeypress = Block;
</script>

Experiment two, the screen mouse right button is not available

Copy Code code as follows:

<script language= "JavaScript" >
function Block (oevent) {
if (window.event) {
Oevent = window.event;
}

if (Oevent.button = = 2) {
Alert ("Mouse right button is not available");

}
}
Document.onmousedown = Block;
</script>

haha ~ As on the implementation of shielding function