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<script language="javascript">
function document.onkeydown()
{
if (event.keyCode==116)
{//屏蔽F5键
event.keyCode = 0;
event.cancelBubble = true;
return false;
}
if (event.keyCode==122)
{//屏蔽F11键
event.keyCode = 0;
event.cancelBubble = true;
return false;
}
if ((event.ctrlKey && event.keyCode==82))
{//屏蔽Ctrl+R
event.keyCode = 0;
event.cancelBubble = true;
return false;
}
if ((event.ctrlKey && event.keyCode==78))
{//屏蔽Ctrl+N
event.keyCode = 0;
event.cancelBubble = true;
return false;
}
if ((event.keyCode == 8) && (event.srcElement.type != "text" &&
event.srcElement.type != "textarea" && event.srcElement.type != "password"))
{//屏蔽BackSpace键
event.keyCode = 0;
event.cancelBubble = true;
return false;
}
}
function document.oncontextmenu()
{
return false;
}
document.fu
</script>