CSS layout problem

Okay, so i got this site up: www.pacific-emarket.com/imts/ and if you are looking at it through Internet Explorer it should appear fine, but through Safari or Opera it looks really weired! How can I fix it and make it compatible!

CSS:

 #top {
 background-image:url(img/hack.gif);
 background-repeat: repeat-x;
 background-color: #FFFFFF;
 height: 60px;
 border-bottom-width: 15px;
 border-bottom-style: solid;
 border-top-color: #666666;
 border-right-color: #666666;
 border-bottom-color: #666666;
 border-left-color: #666666;
 padding-top: 40px;
 padding-left: 40px;
}
#maincenter {
 }
#menu {
 float:left;
 height: 500px;
 background-color: #CCCCCC;
}
.linkContainerOFF p {
 font-family:Verdana, Arial, Helvetica, sans-serif;
 font-size: 12px;
 font-weight: bold;
 color:#333333 border: 0px none;
 height: 10px;
 width:150px;
 border: none;
 height:20px;
}
.linkContainerOFF {
 width:150px;
 text-decoration: none;
 background-color:#CCCCCC;
 color:#000000;
 font-family:Verdana, Arial, Helvetica, sans-serif;
 font-size: 12px;
 color: #000000;
 height:20px;
 padding-top:5px;
}
.linkContainerON a {
font-family:Verdana, Arial, Helvetica, sans-serif;
 size:10px;
 text-decoration:none;
 font-size: 12px;
 color:#990000;
 padding-left: 15px;
 height:20px;
 width:150px;
 
}
.linkContainerOFF a {
font-family:Verdana, Arial, Helvetica, sans-serif;
 size:10px;
 text-decoration:none;
 font-size: 12px;
 color:#0066CC;
 padding-left: 15px;
 height:20px;
 width:150px;
}
.linkContainerON {
 width:150px;
 color:#FFFFFF;
 text-decoration: none;
 height:20px;
 padding-top:5px;
 background-color:#FFFFFF;
}
body {margin-bottom:0;
margin-left:0;
margin-right:0;
margin-top:0;
}
p {
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size: 10px;
 font-weight: normal;
 color: #000000;
 margin: 10px;
 padding: 10px;
 border: 1px solid #999999;
 float:left;
 line-height: 20px;
 width:auto;
}
p .oneStyle {
 font:700 18px/50px Georgia, "Times New Roman", Times, serif;
 color:#333333;
 padding-bottom: 0px;
}
li {
 list-style-image:url(img/bullet.gif);
 font-family: Georgia, "Times New Roman", Times, serif;
 font-size: 12px;
 color: #000000;
 padding: 0px;
 margin: 0px;
 font-weight: bolder;
 list-style-position: inside;
 list-style-type: circle;
}
#maincenter a {
 text-decoration: none;
 border-bottom-width: thin;
 border-bottom-style: dashed;
 border-bottom-color: #CCCCCC;
}
#maincenter a:hover {color:#333333;}