online/invisible? - php skript

Na zistenie ci je nejaky ICQ user online/invisible som vytvoril tento kratky skript:

<cite>
<form action="">
<input type="text" name="icqcislo">
<input type="submit" value="online?">
<img alt="ICQ status" src="http://status.icq.com/online.gif?icq=<?php echo $icqcislo;?>&img=5">
</form>
</cite>

staci napisat ICQ cislo.