.dibupiaofu {
z-index:5; position:fixed; top:0; left:0; width:100%; _position:absolute;_top: expression(documentElement.scrollTop + documentElement.clientHeight-this.offsetHeight);overflow:visible;}
.piaofutiao{Z-INDEX: 6; LEFT: 0px; OVERFLOW: hidden; top: 0px; _POSITION: fixed! important; TEXT-ALIGN: left; width:100%; margin:0 auto; }