var plats = navigator.platform;
var bName = navigator.appName.charAt(0);
var bVers = navigator.appVersion.charAt(0);
var bPath2 ="";

if(plats == "Win32"){
  if((bName == "N") && (bVers >= 4)){
    bPath2 = "../../../../css/product/win_nc";
  } else if((bName == "M") && (bVers >= 4)) {
    bPath2 = "../../../../css/product/win_ie";
  }
} else if(plats == "MacPPC"){
  if((bName == "N") && (bVers >= 4)){
  bPath2 = "../../../../css/product/mac_nc";
  } else if((bName == "M") && (bVers >= 4)) {
    bPath2 = "../../../../css/product/mac_ie";
  }
}
//alert(bPath2);
if(bPath2 != ""){
  document.write('<' + 'LINK REL="StyleSheet" TYPE="text/css" HREF="' + bPath2 + '.css"' + '>');
}