In-VC-achieve-transparent

代码说明：

  有一种按键，看起来是一幅完整的图片，当鼠标移到按键区域时，图片的一部分凸现，形成一个按键，当鼠标移走时又恢复原来状态。(There is a button looks like a complete picture when the mouse is moved to the key areas, the picture is part of the highlights, the formation of a button when the mouse is moved Shiyou restore the original state.)