dl,dd,dt{padding:0; margin:0;}

#accordion_open {width:100%; margin:0px auto}
.accordion_open {width:100%; font-size: small; color:#555555; margin:0px auto}
.accordion_open dt {width:100%; border:0px solid #000000; padding:0px; margin-top:8px; cursor:pointer; background:#ECECEC}
.accordion_open dt:hover {background:#CCCCCC}
.accordion_open dd {overflow:hidden; background:#FFFFFF}
.accordion_open span {font-size: small; color:#555555}