function onsaveimg() {

        $x1 = $this-> post['x1' ];

        $y1 = $this-> post['y1' ];

        $x2 = $this-> post['x2' ];

        $y2 = $this-> post['y2' ];

        $w = $this-> post['w' ];

        $h = $this-> post['h' ];

        $ext = $this-> post['ext' ];

        $upload_tmp_file = TIPASK_ROOT . "/data/tmp/" . 'bigavatar' . $this->user['uid' ] . $ext;

        $avatardir = "/data/avatar/"; //图片存放目录

        $scale = 100 / $w;

        resizeThumbnailImage( $smallimg, $upload_tmp_file, $w, $h, $x1, $y1, $scale);

        copy($upload_tmp_file, TIPASK_ROOT . $dir3 . '/big_' . $uid . $ext);

        is_file($upload_tmp_file) && unlink($upload_tmp_file);

        $_ENV[ 'user']->update_avatar($smallimg);

        $this->message( '头像设置成功！' , 'user/editimg' );

    }