Menu image problem in firefox. - Joomla! Forum - community, help and support

hi there. i've been scatching head trying figure 1 out. i'm doing website friend of mine...basically menu calls images through css file. works fine when @ in firefox standard menu items don't load, when click menu links , new page loads images start appear. it's little hard describe without seeing i've put url , css code below. i'd grateful if me.

http://s185395881.websitehome.co.uk/amarlatif/

code:

body

{
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;

}
body,td,th, tr, p, div {
font-family: trebuchet ms, arial, helvetica, sans-serif;
font-size: 11px;
color: #666666;
line-height: 16px;

}



#headerbox {
position:absolute;
left:0px;
top:5px;
width:640px;
height:94px;
z-index:3;
background-image: url(../images/header.gif);
background-repeat: no-repeat;
}
#menubox {
position:absolute;
left:0px;
top:106px;
width:212px;
height:55px;
z-index:4;
}
#contentbox {
position:absolute;
left:217px;
top:106px;
width:421px;
height:400px;
z-index:5;
}


hr
{
color: #ccc;
background-color: #ccc;
height: 1px;
width: 100%;
}

a:link
{
color: #696d7e;
text-decoration  : underline;

}
a:hover, a:visited
{
text-decoration: underline;
color: #696d7e;
}
a.category:link, a.category:visited
{
  color            : #696d7e;
  font-weight      : bold;
}
a.category:hover
{
  color            : #696d7e;
}
.mainlevel

a.mainlevel:link, a.mainlevel:visited, a.mainlevel:hover {
font-family: trebuchet ms, arial, helvetica, sans-serif;
    display: block;
font-size: 14px;
font-weight: bold;
color: #ffffff;
text-align: left;
width: 100%;
text-decoration: none;
height: 20px;
padding-top: 5px;
text-indent: 30px;
background-image:url(../images/menubg.gif);
background-repeat:no-repeat;
}

#active_menu, a#active_menu:link, a#active_menu:visited {
font-family: trebuchet ms, arial, helvetica, sans-serif;
    display: block;
font-size: 14px;
font-weight: bold;
color: #ffffff;
text-align: left;
width: 100%;
text-decoration: none;
height: 20px;
padding-top: 5px;
text-indent: 30px;
background-image:url(../images/menubgact.gif);
background-repeat:no-repeat;
}

table.moduletable
{
width            : 100%;
margin-bottom    : 5px;
font-weight: normal;
}
table.moduletable th
{
font-weight: bold;
font-size: 12px;
color:#696d7e;
display:block;
float:left;
width: 100%;
text-align: left;
padding-top: 5px;
height: 24px;
text-indent: 10px;

}

.newsflash
{
  font-family      : arial, helvetica, sans-serif;
  font-size        : 10px;
  color            : #868c7c;
  text-transform  : uppercase;
}
.frameheader
{
  font            : arial, helvetica, sans-serif;
  font-size        : 18px;
  font-weight      : none;
  color            : #868c7c;
}
.poll
{
  font-family      : arial, helvetica, sans-serif;
  font-size        : 10px;
  color            : #868c7c;
  line-height      : 15px
}

.inputbox
{
margin-right: 5px;
font-family: trebuchet ms, arial, helvetica, sans-serif;
font-size: 11px;
color: #666666;
text-indent: 5px;
border-top-width: 1px;
border-right-width: 1px;
border-bottom-width: 1px;
border-left-width: 1px;
border-top-style: inset;
border-right-style: solid;
border-bottom-style: solid;
border-left-style: inset;
border-top-color: #cccccc;
border-right-color: #cccccc;
border-bottom-color: #cccccc;
border-left-color: #cccccc;
margin-bottom: 10px;
}

.contentpane
{
padding-left    : 0px;
padding-right    : 0px;
}
.button
{

}
.contentpaneopen
{
color: #868c7c;
width:100%;
margin: 0px;
padding: 0px;
border: none;
font-family: arial, helvetica, sans-serif;
font-size: 10px;
font-weight: normal;
}

.buttonheading
{
vertical-align:top;
}
.componentheading
{
font-family: trebuchet ms, arial, helvetica, sans-serif;
color: #696d7e;
font-weight: bold;
font-size: 14px;
text-indent: 3px;
}
.contentheading
{
font-family: trebuchet ms, arial, helvetica, sans-serif;
color: #696d7e;
font-weight: bold;
font-size: 14px;
}

.contentdescription
{
font-family      : arial, helvetica, sans-serif;
font-size        : 11px;
color            : #868c7c;
text-align      : left;
white-space: nowrap;
}
.category
{
  color            : #868c7c;
  font-family      : arial, helvetica, sans-serif;
  font-size        : 11px;
  font-weight      : bold;
}

.sectiontableheader
{
  font-weight: bold;
  background: #f0f0f0;
}
.sectiontablefooter
{
}

.sectiontableentry1

{
background-color : #ffffff;
}

.sectiontableentry2
{
background-color : #f9f9f9;
}

.small
{
  font-family      : arial, helvetica, sans-serif;
  font-size        : 9px;
  color            : #868c7c;
  text-decoration  : none;
  font-weight      : normal;
 
}

.smalldark
{
  font-family      : arial, helvetica, sans-serif;

  font-size        : 9px;
  color            : #696d7e;
  font-weight      : normal;
}

table.contenttoc {
  border: 1px solid #cccccc;
  padding: 2px;
  margin-left: 2px;
  margin-bottom: 2px;
  align:right;

}

table.contenttoc td {
  padding: 2px;
}

table.contenttoc th {
 
    color: #666666;
text-align: left;
padding-top: 2px;
padding-left: 4px;
height: 21px;
font-weight: bold;
font-size: 10px;
text-transform: uppercase;
}


ul
{
}

li {
list-style-image: url(../images/arrow.png);
}
.readon {

}
.latestnews {
line-height: 16px;
padding-bottom: 4px;
color:#868c7c;
}
a.mainlevel-bottom:link, a.mainlevel-bottom:visited, a.mainlevel-bottom:hover
{
font-family: arial, helvetica, sans-serif;
    font-weight: bold;
font-size: 10px;
color: #696d7e;
text-decoration: none;
}
.pathway {
color: #333333;
font-weight: bold;
}
a.pathway:link,  a.pathway:visited, a.pathway:hover
{
font-family: arial, helvetica, sans-serif;
    font-weight: bold;
font-size: 11px;
color: #868c7c;
text-decoration: none;
}
.searchfield {
background-image: url(../images/searchicon.gif);
background-repeat: no-repeat;
background-position: right;
border: 1px inset #ffffff;
font-family: trebuchet ms, arial, helvetica, sans-serif;
font-size: 11px;
text-indent: 5px;
}

when go page in ie6 , ff2 menus same.  when click on menu item in both browsers still have same style.  version of firefox showing problem?