（1）明示“欢迎光临”代码
<embed src="http://www./bb_midi/welcome.wav" width="300" height="50" type="audio/mpeg" volume="0" showstatusbar="1" autostart="true" loop="0" wmode="transparent" allownetworking="internal" allowscriptaccess="never" style="line-height: 22px;"></div><wbr>
（2）隐藏的“欢迎光临”代码
<embed src="http://www./bb_midi/welcome.wav" width="0" height="0" type="audio/mpeg" volume="0" showstatusbar="1" autostart="true" loop="0" wmode="transparent" allownetworking="internal" allowscriptaccess="never" style="line-height: 22px;"></div><wbr>
