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Design your website in 800x600 resolution, create a 640x480 replica and place the following code between the HEAD tags.
This will work for both Internet Explorer and Netscape v4.0 or higher.
<script language="JavaScript"><!--
var BroW = navigator.appVersion;
//check visitor screen resolution
if (BroW >= 4) {
x = screen.width ; y = screen.height
if (document.layers) {
if ((x >= 800) && (x <= 1028)) {x = 1028}
if ((y >= 600) && (y <= 780)) {y = 780}
if ((x >= 640) && (x <= 800)) {x = 800}
if ((y >= 480) && (y <= 600)) {y = 600}
if (x <= 640) {x = 640}
if (y <= 480) {y = 480}
}
Res = x + "x" + y
} else {
Res = 'unknown'
}
// redirect low resolution
// replace www.mypage.com/d640x480.htm with your own host and page name
if (Res == '640 + "x" + 480')
location.href="http://www.mypage.com/d640x480.htm";
//--></script>Submitted by James Reidy