*{margin:0;border:0;}
#div_center { width:870px; height:27px; margin-left: auto;margin-right:auto;padding:0} /*?????????;background:003399; ??????,????*/ 
#nav { line-height: 24px; list-style-type: none; margin-top:6px; padding:0}         /*????????;???5px;*/   
#nav a { display: block; width: 124px; text-align:center; font-size:11px;padding:0} /*??????????:??????,????,????*/ 
#nav a:link { color:#FFF; text-decoration:none;margin:0;padding:0}     /* ?????? */   
#nav a:visited {color:#FFF;text-decoration:none;margin:0;padding:0}    /* ?????? */ 
#nav a:hover {color:#000;text-decoration:none;padding:0}                /* ?????? */


#nav li {float: left;padding:0 }                   /* ?????? */ 
#nav li.nav01 {float: left;background:url(../images/banback1.jpg); padding:0}                   /* ?????? */ 
#nav li a:hover{background:url(../images/banback1.jpg);padding:0}     /* ?????????????? */ 
#nav li ul {border-top: 1px solid #133A75;line-height: 24px; background-color:#fff; filter: Alpha(Opacity=80);;position:absolute; list-style-type: none;text-align:left;left: -999em; width:210px; position: absolute;padding:0;}             /*????????:??24px;????;????;????;??????,?????,??????,????#003399;???1???*/

#nav li ul a{display:block; width: 210px;text-align:left;text-indent:2px;padding:0}                 /* ????????;????????,???2 */
#nav li ul a:link {color:#000000; text-decoration:none;padding:0}                                   /* ?????? */ 
#nav li ul a:visited {color:#000000;text-decoration:none;padding:0}                                 /* ?????? */
#nav li ul a:hover {color:#FFF;text-decoration:none;font-weight:normal;background:#555555;padding:0}/* ?????? */

#nav li:hover ul {left: auto;padding:0}
#nav li.sfhover ul {left: auto;padding:0}
#content {clear: left;padding:0}

.alpha1{
width:300px;
height:200px;
background-color:#FF0000;
filter: Alpha(Opacity=30);
}
.ap2{
position:relative;
}