为了防止内容被拷贝，通常的办法是屏蔽掉鼠标右键，不让查看源文件，但这也有很多办法突破，如使用Netscape浏览器就不会有这种现象，而且让人觉得很不方便，因为鼠标右键可以用来做其他很多事情，如保存图片啊等等。因此这里再介绍一个更好的办法，不用屏蔽鼠标右键，而是对屏蔽掉鼠标选择要copy内容的功能。-to prevent content copied, the usual approach is to knock out the right mouse button, so to view the source documents, but there are many ways to break through, such as the use Netscape browser would not have this phenomenon, but people think it is very convenient because the right mouse button can be used to do many things, such as the preservation of photographs ah so on. So here again introduced a better way, not shielding the right mouse button, but right mouse shielding opted to swap the contents of the copy function.