JS shield F1 ~ F12 shortcut

 

 Function window. onhelp () {return false} // block F1 help
/* Keycod disabled the F2-F12 key from 113-123, 13 disabled the Enter key, 8 disabled the backspace key )*/

Document. onkeydown = function (){
If (window. Event & window. event. keycode = 113 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 114 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 115 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 116 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 117 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 118 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 119 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 120 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 121 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 122 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 123 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 13 ){
Window. event. keycode = 505;
}
If (window. Event & window. event. keycode = 8 ){
Alert (STR + "\ n please use the Del key to delete characters! ");
Window. event. returnvalue = false;
}
If (window. Event & window. event. keycode = 505 ){
Alert (STR)
Window. event. returnvalue = false;
}
}