// browser detector
function cssLink(url)  {
  if (navigator.platform && (navigator.platform.indexOf('Mac')) > -1) {
  	if (navigator.appName.indexOf('Microsoft') > -1) {
    	document.write('<LINK HREF="' + url + 'mac_ie.css" REL="styleSheet" TYPE="text/css">');
		} else {
		document.write('<LINK HREF="' + url + 'mac_ns.css" REL="styleSheet" TYPE="text/css">');
		}
  } else {
    if (navigator.appName.indexOf('Microsoft') > -1) {
      document.write('<LINK HREF="' + url + 'win_ie.css" REL="styleSheet" TYPE="text/css">');
    } else {
      document.write('<LINK HREF="' + url + 'win_ns.css" REL="styleSheet" TYPE="text/css">');
    }
  }
}