If there's an onlineupgrade.php, installer index.php will link to that instead of upgrade.php (future readiness ;))
html, body {height:98%}
body {
background-color: #FFFFFF;
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 10px;
scrollbar-3dlight-color: #F0F0EE;
scrollbar-arrow-color: #676662;
scrollbar-base-color: #F0F0EE;
scrollbar-darkshadow-color: #DDDDDD;
scrollbar-face-color: #E0E0DD;
scrollbar-highlight-color: #F0F0EE;
scrollbar-shadow-color: #F0F0EE;
scrollbar-track-color: #F5F5F5;
}