IE6支持position:fixed完美解决方法

<!-- compliance patch for microsoft browsers --> 
<!--[if lt IE 7]><link rel="stylesheet" href="ie-stuff.css" type="text/css" media="screen"/><![endif]-->

#footer { 
position: absolute; 
bottom: auto; 
clear: both; 
top:e­xpression(eval(document.compatMode && 
document.compatMode=='CSS1Compat') ? 
documentElement.scrollTop 
+(documentElement.clientHeight-this.clientHeight) - 1 
: document.body.scrollTop 
+(document.body.clientHeight-this.clientHeight) - 1); 
}