Hi, so I have a problem, it's not extremely important that I fix this little problem of mine, but it would feel better and maybe look a bit better too. I have a vertical CSS dropdown menu and I would like to get the undermenues to stay put, so when you click on "Uthyrning" it'll stay open until you click on it again to close.
I haven't done any validation to the code so please have that in mind when you look on the code. The site isn't yet done which I guess you'll see.

Code:
@charset "utf-8";
/* CSS Document */
/*FÄRGSCHEMA*/
/*
#11110a - mörkbrun - bakgrundsfärg
#297ae6 - ljust blå - bakgrundsfärg meny+colorbox + listor
#ffffff - vit - menytextfärg + wrapper bg
#4e4f44 - beigebrun - footer text
#1a275b - mörktblå - rubrikfärg
*/

* {
	padding:0; 
	margin:0; 
	border:0;
}
/*body*/

body {
	font-size:12px; 
	font-family: Arial, Helvetica, sans-serif; 
	background:#11110a; 
	word-wrap:break-word;
}
/*container*/
#container {
	margin-left: auto; 
	margin-right: auto; 
	position:relative; 
	text-align: left;  
	width:1000px;
}
/*top*/
#top {
	height:40px; 
	background-color:#11110a; 
	position: relative; 
	background-repeat:repeat-x;
}
#top #colorbox { 
	background-image:url(bilder/blue.png); 
	background-repeat:repeat-y; 
	height:40px; 
	background-color:#297ae6; 
	width:260px;
}
#top #meny {
	height:40px; 
	background-color:#11110a;
	width:300px; 
	position:relative; 
	margin-right:-6%;
	clear:both; 
	float:right;
}
#top #meny li{ 
	font-size:12px;  
	text-decoration: none; 
	display:inline; 
	padding:0px 0px 0px 0px;
}
#top #meny li a {
	height:21px; 
	width:5em; 
	color:#ffffff;
	float:left; 
	text-decoration: none; 
	text-transform: none; 
	text-align: center; 
	padding-top:10px; 
	padding-bottom:0px;
}
#top #meny ul{
	list-style-type:none; 
	float:left;
}
#top #meny li a:hover{
	color: #297ae6; 
	background-repeat: no-repeat; 
	background-position: center bottom;
} 

/*header*/
#header {
	height:130px; 
	background-color:#11110a;
}
#header #title {
	height:130px; 
	width:360px;  
	position:relative; 
	margin-left:0%; 
	float:left;
}
#header p {
	color:#ffffff; 
	font-size:12px;
}
#header #bild {
	height:127px;
	width:387px;
	float:right;
	position:absolute;
	left: 490px;
	top: 43px;
}
#bild2 {
	height:118px;
	width:136px;
	float:right;
	position:absolute;
	left: 799px;
	top: 170px;
}

/*wrapper*/

#wrapper {
	overflow: hidden; 
	background:#ffffff; 
	background-image:url(bilder/vit.png); 
	background-repeat: repeat-x; 
	width:100%; 
}
#wrapper2 { 
	background-image:url(bilder/blue.png); 
	background-repeat:repeat-y; 
	width:100%; ;
}

#outer1 {
	float:left; 
	width:240px; 
	padding:10px; 
	background:#297ae6; 
	background-color:#069; 
	background-image:url(bilder/blue.png); 
	padding-top:1.5em; 
	background-repeat:repeat-y; 
	overflow: hidden; 
	min-height:600px;
}
#outer2 {
	background:#ffffff; 
	margin-right:20%; 
	margin-left:270px; 
	padding:1.5em; 
	background-image:url(bilder/vit.png); 
	background-repeat: repeat-x; 
	min-height:600px; 
}
#outer3 {
	float:right; 
	width:20%; 
	background:#ffffff;  
	background-image:url(bilder/vit.png); 
	background-repeat: repeat-x; 
	min-height:600px;
}

#outer1, #outer2, #outer3 {
	padding-bottom:320px; 
	margin-bottom:-320px;
}

/*Footer*/
#footer {
	clear: auto; 
	background:#11110a; 
	position: relative;
}
#footer p {
	color:#4e4f44; 
	font-size:12px;
}
#footer a {
	color:#4e4f44; 
	text-decoration:none;
}
#footer a:hover {
	text-decoration: underline;
}
#footer #colorbox2 { 
	background-image:url(bilder/blue.png); 
	background-repeat:repeat-y; 
	background-color:#297ae6; 
	height:40px; 
	padding:0; 
	margin:0; 
	width:260px; 
	float:left; 
	left: 0px; top: 9px;
}
/*Footer text*/
#footerbox {
	width:260px;
}
#righttext {
	float:right; 
	padding-top:0.4em;
}
#lefttext {
	float:left; 
	padding-top:0.4em;
}

/*TEXT*/
.copyw {
	tect-align:center; 
	float:right;
}
.content {
	padding:1.25em; 
	text-align:left;
}
.footertext {
	padding-top:1.25em; 
	text-align:left;
}
.right {
	text-align:right; 
}
.left {
	text-align:left;
}
h1 {
	font-size:14px; 
	margin:0; 
	padding:; 
	color:#1a275b;
}
h3 {
	font-size:36px; 
	margin:0; 
	color:#1a275b;
}
p {
	font-size:14px; 
	line-height:1.5em; 
	margin:0; 
	padding:5px 0; 
	color:#000000;
}
p.liten {
	font-size:12px; 
	line-height:1.2em; 
	margin:0; 
	padding:0; 
	color:#000000;
}
.images_p {
	font-size:12px; 
	color:#000000; 
	padding:0; 
	margin:0; 
	line-height:1em;
}

/*Meny*/
ul {
	font-family:Arial, Helvetica, sans-serif;
}
ul.menu1, ul ul {
	padding:0; 
	margin:0; 
	border:0; 
	list-style-type:none; 
	height:40em; 
	overflow:hidden; 
	width:15em; 
	text-align:left;  
	border:0px solid #606; 
	font-family:Arial, Helvetica, sans-serif; 
	background-image:none; 
}
ul.menu1 {
	margin:0 auto; 
	padding-top:1.5em;
}
ul.menu1 li.drop {
	border-top: 0px solid #000;
}

#uthyrning {
	border-top: 1px solid #297ae6; 
	width:190px; 
	margin-left: auto; 
	margin-right: auto;
}
#kontakt {
	border-top: 1px solid #297ae6; 
	border-bottom:1px solid #297ae6; 
	width:190px; 
	margin-left: auto; 
	margin-right: auto;
}
#hyresvillkor {
	border-top: 1px solid #297ae6; 
	width:190px; 
	margin-left: auto; 
	margin-right: auto;
}
#pris {
	border-top: 1px solid #297ae6; 
	width:190px; 
	margin-left: auto; 
	margin-right: auto;
}
#line {
	border-top: 1px solid #297ae6; 
	width:190px;
	margin-left: auto;
	margin-right: auto;
}

ul.menu1 table {
	border-collapse:collapse; 
	padding:10px; 
	margin:0; 
	font-size:1em; 
}
ul.menu1 ul {
	margin-left:1em; 
}
ul.menu1 li {
	text-indent:1em;
}
ul.menu1 li.drop {
	margin-bottom:-4px; 
	font-size:25px; 
	font-weight: bold; 
	border-bottom:1px #009;
}
ul.menu1 li a, ul.menu1 li a:visited {
	display:block; 
	width:14em; 
	height:2em; 
	line-height:1.9em; 
	text-decoration:none; 
	color:#ffffff;
}
ul.menu1 li a.last, 
ul.menu1 li a.last:visited {
	display:block; 
	width:14em; 
	height:14em; 
	line-height:2em;
}
ul.menu1 li ul {
	display:none;
}
ul.menu1 li:hover a, 
ul.menu1 li a:hover {
	border:; 
	color:#ffffff; 
	font-weight:bold;
}
ul.menu1 li:hover ul, 
ul.menu1 li a:hover ul {
	display: block; 
	height:7em; 
	width:13em; 
	margin-top:-1px;
}
ul.menu1 li:hover ul li a, 
ul.menu1 li a:hover ul li a {
	height:2em; 
	color:#ffffff; 
	font-weight:normal;
}
ul.menu1 li:hover ul li:hover a, 
ul.menu1 li a:hover ul li a:hover {
	background-color:#297ae6; 
	color:#ffffff; 
}
ul.menu1 li.undermeny {
	font-size:12px;
}
 
ul li.maskiner_li {
	color:#297ae6; 
	list-style-type:none; 
	font-size:14px; 
	font-weight:bold;
}
ul li.maskiner_li a,
ul li.maskiner_li a:visited,
ul li.maskiner_li a:hover {
	text-decoration:none; 
	color:#297ae6;
}


/*bILDER*/
.img {
	position:absolute; 
	left: 805px; 
	top: 265px; 
	width: 0px; 
	height: 428px; 
}
.maskiner {
	border:3px #0066CC; 
	padding-right:15px;
}
.menyend {
	position: absolute;
	left: 0px;
	top: 830px;
	overflow:hidden;
}
/*TABLE*/
table.stats {
	text-align: center;
	font-family: Verdana, Geneva, Arial, Helvetica, sans-serif ;
	font-weight: normal;
	font-size: 11px;
	color: #fff;
	width: 500px;
	background-color: #4e4f44;
	border: 0px;
	border-collapse: collapse;
	border-spacing: 0px;
}

table.stats td {
	background-color: #cccccc;
	color: #000;
	padding: 4px;
	text-align: left;
	border: 1px #fff solid;}

table.stats td.top {
	background-color: #1a275b;
	color: #fff;
	padding: 4px;
	text-align: left;
	border-bottom: 2px #fff solid;
	font-size: 12px;
	font-weight: bold;} 

/*LIGHTBOX*/
.product {
	width:320px; 
	height:120px; 
	border:0px solid #CCCCCC; 
	margin:0 ; 
	padding:10px; 
	background-color:#ffffff;
}
.litentext {
	font:bold 11px/14px arial,sans-serif; 
	color:#000;	
}
.productInfo {
	width:200px; 
	float:right;
}
.productMfr {
	font:bold 16px/18px arial, sans-serif; 
	color:#1a275b; 
	padding:0; 
	margin:0;
}
.productType {
	font:bold 14px/18px arial, sans-serif; 
	color:#000; 
	padding:0; 
	margin:0;
}
.features {
	padding:10px 0; 
	margin:0; 
	list-style:none;
}
.features li {
	font:normal 12px/16px arial, sans-serif; 
	color:#555;
}
.price {
	font:bold 14px/18px arial, sans-serif; 
	color:#00c; 
	padding:0 0 10px 0; 
	margin:0;
}
And here's the menu code:
Code:
 <ul class="menu1">
              <li class="drop" id="startsida"><a href="index.html" title="Startsida">Startsida</a>
                <table>
                  <tr>
                    <td></td>
                  </tr>
                </table>
              </li>
              <li class="drop" id="uthyrning"><a href="uthyrning.html" title="Uthyrning">Uthyrning</a>
                <table>
                  <tr>
                    <td><ul>
                      <li class="undermeny"><a href="slap.html">Slaumlpvagnar</a></li>
                      <li class="undermeny"><a href="verktyg.html">Verktyg</a></li>
                      <li class="undermeny"><a href="maskiner2.html">Maskiner</a></li>
                      <li class="undermeny"><a href="vagnar.html">Rast/Manskapsvagnar</a></li>
                      <li class="undermeny"><a href="gravmaskiner.html">Gr&auml;vmaskiner</a></li>
                      <li class="undermeny"><a href="komp.html">Kompressorer</a></li>
                      <li class="undermeny"><a href="ovrigt.html">Övrigt</a></li>
                    </ul></td>
                  </tr>
                </table>
              </li>
              <li class="drop" id="hyresvillkor"><a href="hyra.html" title="Hyresvillkor">Hyresvillkor</a>
                <table>
                  <tr>
                    <td>
                  </tr>
                </table>
              </li>
              <li class="drop" id="pris"><a href="pris.html" title="Prislista">Prislista</a></li>
              <li class="drop" id=""></li>
                <li class="drop" id="kontakt"><a href="kontakt.html" title="Kontakta Oss">Kontakt</a>
                <table>
                  <tr>
                    <td></td>
                  </tr>
                </table>
              </li>
               <li class="drop" id=""></li>
            </ul>
	</div>