关于怎么在网页下运行java程序

关于如何在网页下运行java程序
我的浏览器是ie7.0
当在网页下运行java程序时提示:alt= "Your   browser   understands   the   <APPLET>   tag   but   isn 't   running   the   applet,   for   some   reason. "   Your   browser   is   completely   ignoring   the   <APPLET>   tag!  
请问如何解决!

[解决办法]
装个applet插件！