#fondo{
		BORDER-RIGHT: red outset; 
		BORDER-TOP: red outset; 
		BORDER-LEFT: red outset; 
		BORDER-BOTTOM: red outset
		postition: absolute; 



background: lightblue url(http://www.briconova.com/imatges/bottom-fade.png) no-repeat bottom;



} 

siempre se vera al pie del contenido. y para IE declaras: 

<!--[if IE]> 
<style> 
#fondo{background-attachment:fixed;} 
</style> 
<![endif]-->