Create a news CSS document (iestyles.css):
/*Style for IE7*/
#adv-search dl{
margin: 0;
padding: 0;
}
#adv-search dt{ 
margin: 0;
padding: 0;
display:inline;
}
#adv-search dd{
margin: 0;
padding: 0;
display:inline;
float: none;
}
#adv-search dt+dd{
display:block;
}

HTML head:
<!--[if IE]>
    <link rel="stylesheet" type="text/css" href="../css/iestyles.css" />
<![endif]-->
HTML body apply adv-search id to the div containing the dl.

have dt and dd inline is done automatically in Firefox, but screws up in IE7. So we need additional css rules, which have to be applied only if IE is used.

definition list, dt and dd on same line IE7

layout

PHP