js屏蔽浏览器（IE和FireFox）的刷新和右键等功能

http://www.cnblogs.com/zzh/archive/2009/03/17/1414150.html
一，js屏蔽浏览器（IE和FireFox）的刷新功能

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;
}
}

二，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