*{padding:0; margin:0px;}
body {
 font-family: arial, 宋体, serif;
        font-size:12px;
}


#nav {
  line-height: 25px;  list-style-type: none; background:#666;
}

#nav a {
 display: block; width: 100px; text-align:center;
}

#nav a:link  {
 color:#666; text-decoration:none;
}
#nav a:visited  {
 color:#666;text-decoration:none;
}
#nav a:hover  {
 color:#37b1dc;text-decoration:none;font-weight:bold;
}

#nav li {
 float: left; width: 100px; 
}
#nav li a:hover{

}
#nav li ul {
 line-height: 25px;  list-style-type: none;text-align:left;
 left: -999em; width: 100px; position: absolute;
}
#nav li ul li{
 float: left; width: 100px;
 background-image:url(../Images/a1.png);
}


#nav li ul a{
 display: block; width: 100px;text-align:center;
}

#nav li ul a:link  {
 background-image:url(../Images/a1.png); text-decoration:none;
}
#nav li ul a:visited  {
 background-image:url(../Images/a1.png);text-decoration:none;
}
#nav li ul a:hover  {
 color:#F3F3F3;text-decoration:none;font-weight:normal;
 background-image:url(../Images/a2.png)
}

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