[Javascript] 새로고침 막기

[Javascript] 새로고침 막기

function NotReload() { 
    if((event.ctrlKey == true && (event.keyCode == 78 || event.keyCode == 82)) || (event.keyCode == 116) ) { 
        event.keyCode = 0; 
        event.cancelBubble = true; 
        event.returnValue = false; 
    } 
} 
document.onkeydown = NotReload;