禁止页面F5/右键菜单栏

//禁止页面刷新F5
document.onkeydown = function(event){
if(event.keyCode==116 ||(event.ctrlKey && event.keyCode==82)||event.keyCode==122){
event.keyCode = 0;
event.cancelBubble = true;
return false;
}
}
//禁止弹出刷新菜单
document.oncontextmenu=function(){
return false;
}