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));
}

CSS PNG Transparency

This sample provides a CSS class that fills a background of an element with a semi-transparent PNG. This one does a shadow-fading effect along a horizontally stretched DIV or TD:

/* Tested in IE6, IE7, Safari and FF. */
.fade-down-white {
  background: transparent url(images/fade_down_white.png) top repeat-x;
  height: 50px;
  width: 100%;
  _background: none;
  _filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/fade_down_white.png',
sizingMethod='scale');
}