function ctrlShiftKey(e,t){return e.ctrlKey&&e.shiftKey&&e.keyCode===t.charCodeAt(0)}document.addEventListener("contextmenu",e=>e.preventDefault()),document.onkeydown=(e=>{if(123===event.keyCode||ctrlShiftKey(e,"I")||ctrlShiftKey(e,"J")||ctrlShiftKey(e,"C")||e.ctrlKey&&e.keyCode==="U".charCodeAt(0))return!1});