text: import React from 'react';
  
  class NavHeader extends React.Component {
    handleBack(){
      this.context.router.goBack();
    }
    render () {
      return(
        <div className="nav-header">
          <button type="button" className="btn btn-default" aria-label="Left Align" onClick={this.handleBack.bind(this)}>
          <span className="glyphicon glyphicon-align-justify" aria-hidden="true"></span>BACK
          </button>
          <h3>liuxicui@{this.props.title}</h3>
          <button type="button" className="btn btn-default" aria-label="Left Align">
          <span className="glyphicon glyphicon-qrcode" aria-hidden="true"></span>
          </button>
        </div>
      )
    }
  }
  NavHeader.contextTypes = {
    router: React.PropTypes.object
  };
  export default NavHeader;
  