risolto..

codice:
<input type="button" onclick="window.open('/reserved/widget/playlist.html','','top=50,left= 870,width=438,height=370')"  style="background-image:url('http://matricoledamsrm3.altervista.org/images/pulsanti/iconplaylist.png');
background-repeat:no-repeat;background-position:center center;
width:60px;height:55px;background-color:0000ff;" value=" "></form></td>

Ultimamente c'è poca gente che risponde vabbè..