content: import React from 'react';
  
  import CommonHeaderLeft   from './common_header_left';
  import CommonHeaderCenter from './common_header_center';
  import CommonHeaderRight  from './common_header_right';
  
  class CommonHeader extends React.Component {
      render() {
          return (
              <nav className = "nav-container">
                  <div className = "nav-content">
                      <CommonHeaderLeft/>
                      <div className = "nav-body">
                          <CommonHeaderCenter/>
                          <CommonHeaderRight/>
                      </div>
                  </div>
              </nav>
          );
      };
  };
  
  export default CommonHeader;