<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="content-type" content="text/html;charset=gb2312"><style><!--#gg {width:303px;height:106px;border:1px solid;margin-top:240px;margin-left:80px;text-align:center;}--></style></head><body><div style="width:445px;height:725px;background:url(251.jpg);"><div id="gg"><marquee height=106 width=303 direction=up align=center >公告</marquee></div></div></body></html>应该要怎么啊?感觉很烦恼啊.自己怎么这么菜的.