Make Background Image a Link

How do I make my entire background image (bg.png) one giant link?

Here is my code:
‘body {
background-image: url(‘images/bg.png’);
background-position: center top;
background-attachment: fixed;
font-family: verdana, arial, tahoma, sans-serif;
font-size: 8pt;
margin:0px;
color:#FFFFFF;
}’

Thanks!