document.write('<optgroup label="FORKLIFT">');
	 document.write('<option value="http://www.shlongyuan.com/">Shanghai</option>');
     document.write('<option value="http://www.bestchache.com/">Nanjing</option>');
     document.write('<option value="http://www.daewoopower.com/">Tianjin</option>');

     document.write('</optgroup>');
     document.write('<optgroup label="ENGINE">');
     document.write('<option value="http://www.li-china.com">Dongguan</option>');

     document.write('</optgroup>');