if (navigator.appVersion.indexOf('Mac') > -1) {
	//mac
	if (navigator.appName.charAt(0)=="N") {
		document.write('<LINK REL="styleSheet" TYPE="text/css" HREF="/css/mac_nn.css">');
	} else {
		document.write('<LINK REL="styleSheet" TYPE="text/css" HREF="/css/mac_ie.css">');
	}
} else {
	if (navigator.appName.charAt(0)=="N") {
		document.write('<LINK REL="styleSheet" TYPE="text/css" HREF="/css/win_nn.css">');
	} else {
		document.write('<LINK REL="styleSheet" TYPE="text/css" HREF="/css/win_ie.css">');
	}
}
<!--
var win= null;
function OpenNewWindow(mypage,w,h,myname){
var winl = (screen.width-w)/2;
var wint = (screen.height-h)/2;
settings='height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars=yes,toolbar=no,location=no,status=no,menubar=no,resizable=yes,dependent=no'
win=window.open(mypage,myname,settings)
if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}
//-->