<select name="marque" size="1">
<option value="toshiba" SELECTED>toshiba</option>
<option value="siemens">siemens</option>
</select>
ça devrais marcher...
$link=mysql_connect($host,$user,$pass);
$result=mysql_query("SELECT a,b FROM table" );
while($line=mysql_fetch_row()){
$a=$lines[0];
$b=$lines[1]
}
$mysql_close($link);