This gist is the sticky footer hack, for modern browsers .. it supports IE8 too

SickyFooter.html

<div id="wrap">

	<div id="header">

	</div>

	<div id="main">

	</div>

</div>

<div id="footer">

</div>

stickyFooter.css

html, body {height: 100%;}

#wrap {min-height: 100%;}

#main {overflow:auto;
	padding-bottom: 150px;}  /* must be same height as the footer */

#footer {position: relative;
	margin-top: -150px; /* negative value of footer height */
	height: 150px;
	clear:both;} 

/*Opera Fix*/
body:before {
	content:"";
	height:100%;
	float:left;
	width:0;
	margin-top:-32767px;/
}
/*And on your html page you will need this conditional style for IE6 and earlier and for IE8 (!IE7 means not 7, but all others);*/
<!--[if !IE 7]>
	<style type="text/css">
		#wrap {display:table;height:100%}
	</style>
<![endif]-->