如何设置body内容不能复制？
通过在body标签上设置相关的属性：
<body oncontextmenu="return false" ondragstart="return false" onbeforecopy="return false" oncopy="document.selection.empty()" onselect="document.selection.empty()" onselectstart="return false">
通过在body标签上设置相关的属性：
<body oncontextmenu="return false" ondragstart="return false" onbeforecopy="return false" oncopy="document.selection.empty()" onselect="document.selection.empty()" onselectstart="return false">
