start radio - stop musik

<div align="center"><base target="musik">
<font color="#ff0000"><u><b>.::</b>RADIO<b>::.</b></u></font><br>
<a href="http://www.thevoice.dk/player/player.html" target="radio"><font color="#0000ff">TheVoice</font></a><br>
<a href="http://www.100fm.dk/netradio/" target="radio"><font color="#0000ff">100FM</font></a><br>
<font color="#ff0000"><u><b>.::</b>MUSIK<b>::.</b></u></font><br>
<a href="backtoyourheart.htm"><font color="#0000ff">Back To Your Heart</font></a><br>
<a href="aneverendingstory.htm"><font color="#0000ff">A Never Ending Story</font></a><br>
<a href="DoWhatsGoodForMe.htm"><font color="#0000ff">Do Whats Good For Me</font></a><br>
<a href="GetReadyForThis.htm"><font color="#0000ff">Get Ready For This</font></a><br>
<a href="BeautifulLife.htm"><font color="#0000ff">Beautiful Life</font></a><br>
<a href="stop.htm"><font color="#ff0000"><b>.::</b>Stop radio/musik<b>::.</b></font></a><br>
<iframe name="musik" height="110" width="325">
<iframe name="radio" height="0" width="0">
</div>

Når man har valgt noget musik og derefter radio
hvordan for jeg den så til at stoppe musiken og starte radioen???