CSS Fixed footer, fixed header

/* Tested in IE6,IE7, Safari and FF */

html, body {
 padding: 0;
 margin: 0;
 _background: url(nothing) fixed;
}

.fixed-bottom {
 position: fixed;
 bottom: 0;
 left: 0;
 _position: absolute;
 _top: expression(document.body.scrollTop + (document.body.clientHeight - this.clientHeight));
}

.fixed-top {
 position: fixed;
 top: 0;
 left: 0;
 _position: absolute;
 _top: expression(eval(document.body.scrollTop));
}