// объявить массив не поддерживающих
$browsers = array ( "Mozilla/1.7", "Mozilla/1.6","Mozilla/1.5","Mozilla/1.4","Mozilla/1.3",
"Mozilla/1.2","Mozilla/1.0","Mozilla/0.",
"Firefox/0.8","Firefox/0.7","Firefox/0.6","Firefox/0.5",
"Firefox/0.4","Firefox/0.3","Firefox/0.2","Firefox/0.1",
"Safari/1.1","Safari/1.0","Safari/0",
"MSIE 5.0","MSIE 4.0","MSIE 3.0","MSIE 2.0","MSIE 1.0",
"Opera 8.","Opera 7.","Opera 6.", "Opera 5.",
"Opera 4.","Opera 3.","Opera 2.","Opera 1.","Opera 0.",
"Opera/8.","Opera/7.","Opera/6.","Opera/5.","Opera/4.",
"Opera/3.","Opera/2.","Opera/1.","Opera/0."
) ;
// проверить входит ли браузер пользователя в массив
foreach($browsers as $val)
{
$old=strpos( "".$_SERVER['HTTP_USER_AGENT']."","".$val."");
}
// если не входит вывести прозрачные элементы
if(!$old)
{
...............
}
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