document.onkeydown = function (e) {
if (event.keyCode == 123) {
return false;
}
if (e.ctrlKey && e.shiftKey && (e.keyCode == 'I'.charCodeAt(0) || e.keyCode == 'i'.charCodeAt(0))) {
return false;
}
if (e.ctrlKey && e.shiftKey && (e.keyCode == 'C'.charCodeAt(0) || e.keyCode == 'c'.charCodeAt(0))) {
return false;
}
if (e.ctrlKey && e.shiftKey && (e.keyCode == 'J'.charCodeAt(0) || e.keyCode == 'j'.charCodeAt(0))) {
return false;
}
if (e.ctrlKey && (e.keyCode == 'U'.charCodeAt(0) || e.keyCode == 'u'.charCodeAt(0))) {
return false;
}
if (e.ctrlKey && (e.keyCode == 'S'.charCodeAt(0) || e.keyCode == 's'.charCodeAt(0))) {
return false;
}
}
