/* set variable */

  var cssDir = '/css/';

  var cssTags = '<link rel="stylesheet" type="text/css" href="';

  var flag = null;

  var _poor = 'Ooops! no support';

  var _rich = 'Ooops! not NS6 yet...';



/* css deverge for cross platform & cross browser */

  if (_win) { // win os

    if (_ns6) { // win_ns 6.x

      flag = 'wns6';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="WinNS6_style">');

      document.close();

    }

    else if (_ns4 || _ns4up || _nav) { // win_ns 4.x

      flag = 'wns';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="WinNS_style">');

      document.close();

    }

    else if (_ie4 || _ie4up || _ie5 || _ie5up) { // win_ie

      flag = 'wie';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="WinIE_style">');

      document.close();

    }

    else if (_ns2 || _ns3 || _ie3) { // win no support browser

      flag = _poor + ' browser...';

      alert(flag);

    }

    else if (_opera) {

      flag = 'wie';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="WinOpera_style">');

      document.close();

    }

    else {

      flag = _poor + ' browser...';

      alert(flag);

    }

  }

  else if (_mac) { // mac os

    if (_ns6) { // mac_ns 6.x

      flag = 'mns6';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="MacNS6_style">');

      document.close();

      //alert(_rich);

    }

    else if (_ns4 || _ns4up || _nav) { // mac_ns 4.x

      flag = 'mns';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="MacNS_style">');

      document.close();

    }

    else if (_ie5 || _ie5up) { // mac_ie

      flag = 'mie';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="MacIE_style">');

      document.close();

    }

    else if (_ie4 || _ie45 || _ie4up) { // mac no support browser

      flag = 'mie';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="MacIE_style">');

      document.close();

    }

    else if (_ns2 || _ns3 || _ie3) { // mac no support browser

      flag = _poor + ' browser...';

      alert(flag);

    }

    else if (_opera) {

      flag = 'mie';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="MacOpera_style">');

      document.close();

    }

    else if (_icab) {

      flag = 'icab';

      document.open();

      document.write(cssTags + cssDir + flag + '.css" title="MaciCab_style">');

      document.close();

    }

    else {

      flag = _poor + ' browser...';

      alert(flag);

    }

  }

  else {

    flag = _poor + ' platform...';

    //alert(flag);

  }