// 屏蔽右键，F5,F11,Ctrl+N;　地址栏，状态栏，工具栏也都去掉
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

function document.onclick()
{
  if (event.srcElement.tagName == "A" && event.shiftKey)
  {
        event.cancelBubble = true;
        event.returnValue = false;
  }
}

// 导航菜单样式