从unity3d论坛上看到一句话： “ I have made additional tests and here's my conclusion : the only HTML element you can successfully display over the web player is the IFRAME. However, its background has to be fully opaque. Usage of transparency make it invisible. Don't mess with Rokbox, make it simpler . ” 对HTML不是太熟悉，没太明白具体要怎么做，求详细解决办法，拜谢了。