<script type="text/javascript">
<!--
browser = navigator.appName
ver = navigator.appVersion
version = ver.substring(0,1)
if (browser=="Internet Explorer") {
if (version<="8.1")
document.location.href="lores.htm"
}
if (browser=="Safari") {
if (version<="6.0")
document.location.href="lores.htm"
}
if (browser=="Firefox") {
if (version<="5.0")
document.location.href="lores.htm"
}
if (browser=="Chrome") {
if (version<="15.0")
document.location.href="lores.htm"
}
if (browser=="Opera") {
if (version<="11.10")
document.location.href="lores.htm"
}
//-->
</script>

function get_browser_version(){
  var N=navigator.appName, ua=navigator.userAgent, tem;
  var M=ua.match(/(opera|chrome|safari|firefox|msie)/?s*(.?d+(.d+)*)/i);
  if(M && (tem= ua.match(/version/([.d]+)/i))!= null) M[2]= tem[1];
  M=M? [M[1], M[2]]: [N, navigator.appVersion, '-?'];
  return M[1];
}

var browser = navigator.appName;
var version = get_browser_version();

if (browser=="Microsoft Internet Explorer") {
    if (version<="8.1")
        document.location.href="lores.htm"
}

<script type="text/javascript">
browser = navigator.appName;
ver = navigator.appVersion;
version = ver.substring(0, ver.indexOf(' '));
if (browser == "Internet Explorer") {
    if (version <= "8.1")
        document.location.href = "lores.htm";
}
if (browser == "Safari") {
    if (version <= "6.0")
        document.location.href = "lores.htm";
}
if (browser == "Firefox") {
    if (version <= "5.0")
        document.location.href = "lores.htm";
}
if (browser == "Chrome") {
    if (version <= "15.0")
        document.location.href = "lores.htm";
}
if (browser == "Opera") {
    if (version <= "11.10")
        document.location.href = "lores.htm";
}
</script>