AJAX和HTML代码

Sorry I am still a beginner this code is not recognized in internet explorer. I dont have a clue why? can anybody help me

    <a id="led0" onclick="newAJAXCommand('leds.cgi?led=0');">&bull;</a>
    <a id="led1" onclick="newAJAXCommand('leds.cgi?led=1');">&bull;</a>
    <a id="led2" onclick="newAJAXCommand('leds.cgi?led=2');">&bull;</a>
    <a id="led3" onclick="newAJAXCommand('leds.cgi?led=3');">&bull;</a>
    <a id="led4" onclick="newAJAXCommand('leds.cgi?led=4');">&bull;</a>
    </font></span></p>
</div>
</div>
</body>
</html>