text: /**
   * 정렬에 사용되는 펑션 모음
   * @param col
   * @returns {object}
   */
  FGR.prototype.sort_func = function(col){
    return {
      number_asc: function (a,b) {
        if(a[col] === null) return 1;
        if(b[col] === null) return -1;
        return  a[col] - b[col];
      },
      number_desc: function (a,b) {
        if(a[col] === null) return 1;
        if(b[col] === null) return -1;
        return -a[col] + b[col];
      },
      str_asc: function (a,b) {
        if(a[col] === null || a[col] === '') return 1;
        if(b[col] === null || b[col] === '') return -1;
        return (a[col] < b[col]) ? -1 : 1;
      },
      str_desc: function (a,b) {
        if(a[col] === null || a[col] === '') return 1;
        if(b[col] === null || b[col] === '') return -1;
        return (a[col] > b[col]) ? -1 : 1;
      },
      revert: function (a,b) {
        return  a.index - b.index;
      },
    };
  };