JS 屏蔽刷新，屏蔽右键

// 屏蔽刷新代码
document.onkeydown=function()
{
    if ((window.event.keyCode==116) || //屏蔽 F5
        (window.event.keyCode==122) || //屏蔽 F11
        (window.event.shiftKey && window.event.keyCode==121) //shift+F10
       )
    {
        window.event.keyCode=0;
        window.event.returnValue=false;
    }
    if ((window.event.altKey)&&(window.event.keyCode==115)) { //屏蔽Alt+F4
        window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
        return false;
    }
}
// 屏蔽右键
if (window.Event)
    document.captureEvents(Event.MOUSEUP);
function nocontextmenu() {
    event.cancelBubble = true;
    event.returnValue = false;
    return false;
}
function norightclick(e) {
    if (window.Event) {
        if (e.which == 2 || e.which == 3)
            return false;
    }
    else
        if (event.button == 2 || event.button == 3) {
            event.cancelBubble = true;
            event.returnValue = false;
            return false;
        }
}
document.oncontextmenu = nocontextmenu; // for IE5+
document.onmousedown = norightclick; // for all others