Гаден проблем с CSS в мозила

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Здравейте имам много гаден проблем с 1 css меню . Значи под ИЕ 7 си работи супер , но под мозила се прецаква супер много . Знам че трябва да се сложи някакъв код в CSS-а, но незнам какъв. Моля помогнете.

.preload1 {
background: url(images/butt.jpg);
}
.preload2 {
background: url(images/six_1a.gif);
}

#nav {
padding:0;
margin:0; 
list-style:none; 
height:38px; 
width:580px; 
background:#fff url(images/butt.jpg) repeat-x; 
position:relative; 
z-index:200; 
font-family:arial, verdana, sans-serif;
}
#nav li.top {
display:block; 
float:left;
}
#nav li a.top_link {
display:block; 
float:left; 
height:35px; 
line-height:33px; 
color:#ccc; 
text-decoration:none; 
font-size:11px; 
font-weight:bold; 
padding:0 0 0 12px; 
cursor:pointer;
background: url(images/butt.jpg);
}
#nav li a.top_link span {
float:left; 
display:block; 
padding:0 23px 0 12px; 
height:35px; 
background: url(images/butt.jpg) right top no-repeat;
}
#nav li a.top_link span.down {
float:left; 
display:block; 
padding:0 24px 0 12px; 
height:35px; 
background: url(images/butt.jpg) no-repeat right top;}


#nav li:hover a.top_link,
#nav a.top_link:hover
{
color:#fff; 
background: url(images/but.jpg) no-repeat;}
#nav li:hover a.top_link span, 
#nav a.top_link:hover span
{
background:url(images/but.jpg) no-repeat right top;
}
#nav li:hover a.top_link span.down,
#nav a.top_link:hover span.down
{
background:url(images/six_1a.gif) no-repeat right top;
padding-bottom:3px;
}

#nav table {
border-collapse:collapse; 
padding:0; 
margin:0; 
position:absolute; 
left:0; 
top:0;}

#nav li:hover {
position:relative; 
z-index:200;}
#nav a:hover {
position:relative; 
white-space:normal; 
z-index:200;}

#nav :hover ul.sub
{
left:1px; 
top:38px; 
background: #50b5d0; 
padding:3px; 
border:1px solid #0b4d97; 
white-space:nowrap; 
width:90px; 
height:auto; 
z-index:300;}
#nav :hover ul.sub li
{
display:block; 
height:20px; 
position:relative; 
float:left; 
width:90px; 
font-weight:normal;
}
#nav :hover ul.sub li a
{
display:block; 
font-size:11px; 
height:18px; 
width:88px; 
line-height:18px; 
text-indent:5px; 
color:#000; 
text-decoration:none;
border:1px solid #50b5d0;}
#nav li ul.sub li a.fly
{
background:#50b5d0 url(images/arrow.gif) 80px 6px no-repeat;
}
#nav :hover ul.sub li a:hover 
{
background:#3f96a9; 
color:#fff; 
border-color:#fff;
}
#nav :hover ul.sub li a.fly:hover
{
background:#3f96a9 url(images/arrow_over.gif) 80px 6px no-repeat; 
color:#fff;
}

#nav li b 
{
display:block; 
font-size:11px;
height:18px; 
width:88px; 
line-height:18px; 
margin-bottom:3px; 
text-indent:6px; 
color:#ff6; 
border-bottom:1px solid #ff6; 
cursor:default;
}

#nav a:hover a:hover ul,
#nav a:hover a:hover a:hover ul,
#nav a:hover a:hover a:hover a:hover ul,
#nav a:hover a:hover a:hover a:hover a:hover ul
{
left:89px; 
top:-4px; 
background: #50b5d0; 
padding:3px; 
border:1px solid #0b4d97; 
white-space:nowrap; width:90px; 
z-index:400; 
height:auto;}

#nav ul, 
#nav a:hover ul ul,
#nav a:hover a:hover ul ul,
#nav a:hover a:hover a:hover ul ul,
#nav a:hover a:hover a:hover a:hover ul ul
{
position:absolute; 
left:-9999px; 
top:-9999px; 
width:0; 
height:0; 
margin:0; 
padding:0; 
list-style:none;}

#nav li:hover li:hover > ul
{
left:90px; 
top:-4px; 
background: #50b5d0; 
padding:3px; 
border:1px solid #0b4d97; 
white-space:nowrap; 
width:90px; 
z-index:400; 
height:auto;}
#nav li:hover > ul ul 
{
position:absolute; 
left:-9999px; 
top:-9999px; 
width:0; 
height:0; 
margin:0; 
padding:0; 
list-style:none;}
#nav li:hover li:hover > a.fly
{
background:#3f96a9 url(images/arrow_over.gif) 80px 6px no-repeat; 
color:#fff; 
border-color:#fff;
} 
#nav li:hover li:hover > li a.fly
{
background:#50b5d0 url(images/arrow.gif) 80px 6px no-repeat; 
color:#000; 
border-color:#50b5d0;
}

Това е CSS-а, а това е сайтът : http://zt-bg.com
Мерси предварително ! и +1 ако помотнетел :?: