Yeah, I kinda got that while I was writing my response, but decided not to bother with it because it wasn't your main question. There are various ways this could be done. If you are still interested, here's one:
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<div>
<script type="text/javascript">
function resMsg(){
var msg, res=screen.width+'x'+screen.height;
switch (res){
case '640x480':
msg="Message for 640x480";
break;
case '800x600':
msg="Message for 800x600";
break;
case '1024x768':
msg="Message for 1024x768";
break;
case '1280x1024':
msg="Message for 1280x1024";
break;
case '1440x900':
msg="Message for 1440x900";
break;
default:
msg="Nice "+res+" monitor!";
}
document.write(msg);
}
resMsg();
</script>
</div>
</body>
</html>
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