.dropdown * {
 margin: 0px;
 padding: 0px;
}
.dropdown {
 margin: 0 0 5px 0;
 padding: 0px;
}
.dropdown, .dropdown ul, .dropdown li {
/* width: 188px;   メニューの幅 */
font-size:13px;
}
.dropdown a {
 display: block;
 padding: 0;
}
.dropdown a, .dropdown a:link, .dropdown a:hover, .dropdown a:visited {
 color: #000;  /* 文字色 */
 text-decoration: none;
}

.dropdown li {
 position: relative;
 display: block;
 list-style: none;
margin:0 0 -2px 0;
padding:0px;
border:solid 1px silver;
}

.dropdown ul {
 visibility: hidden;
 position: absolute;
 left: 188px;  /* メニューの幅と同じ値 */
 top: 0px;  /* サブメニューのボーダー幅を減算 */
}
.dropdown li:hover ul {
 visibility: visible;
}
.dropdown li li{border:solid 0px silver;
}
.dropdown li ul li a{
background:url('//www.police.pref.fukuoka.jp/data/css/img_menu/sub-subback.gif') no-repeat left center;
text-indent:0px;
display:block;
height:18px;
padding:7px 0 5px 20px;
margin:0px;
border:solid 1px silver;
color:blue;
width:230px;
}
.dropdown li ul li a:hover{
background:url('//www.police.pref.fukuoka.jp/data/css/img_menu/sub-subback.gif') no-repeat left center;
color:red;
}
img{vertical-align:bottom;}

.menu {
 margin: 0 0 5px 0;
 padding: 0px;
 left: 188px;
}
.menu TD {
 border:solid 1px silver;
}