Beer Getter

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Beer Getter </title>
<script type="text/javascript">
var beer = 0;
function getBeer(){
    if (beer == 0){
    beer++;
    alert("Beer?! Thanks!");
    }
alert("Cheers!");
}
document.onload = getBeer();
</script>
</head>