function redir(obj)
{
  var i = obj.selectedIndex;
  if (obj.options[i].value != 'empty')
  {
  	document.location = obj.options[i].value;
  }
}

function display_business()
{
  var content = '      <form name="business">';
      content += '<p align="right"> ';
      content += '<select name="choice" size="1" onChange="redir( choice );" id="choice">';
      content += '   <option value="business" selected>请选择项目</option>';
      content += '   <option value="index.shtml">分行及员工数字</option>';      
      content += '   <option value="business_a.shtml">土地注册处资讯</option>'; 
      content += '   <option value="business_b.shtml">美联成交</option>'; 
      content += '   <option value="business_c.shtml">主要财政指数</option>';
      content += '</select></form></p>';
      document.write(content);
      document.close();
}