html,body{margin:0; padding:0;background-image:url(about:blank);background-attachment:fixed;}

.wrap{height:2000px; background:blue}
.float
{
     background-color:rgba(255, 255, 255, 0.0)
    text-align: center;
    font-size: 14px;
    z-index: 9999;
    position: fixed;
    _position: absolute;
}


#center{
    width:220px;
    height:370px;
    line-height:100px;
    margin:-50px 0 0 -100px;
    top: 50%;
    left: 50%;
    _top: expression(eval(documentElement.scrollTop + (document.documentElement.clientHeight-this.offsetHeight)/2));
    _left: expression(eval(documentElement.scrollLeft + (document.documentElement.clientWidth-this.offsetWidth)/2));
    _margin:0;
}

a{ TEXT-DECORATION:none }