code: function ( includeMargin ) {
              var el = this.element(),
                  margin = 0;
      
              if ( el === window ) {
                  if ( window.outerWidth ) {
                      return window.outerWidth;
                  } else {
                      return $B.measure.windowWidth();
                  }
              } else if ( el === document ) {
                  return $B.measure.documentWidth();
              } else if ( el === screen ) {
                  return screen.width;
              } else {
                  if ( includeMargin === true ) {
                      var marginL = parseFloat( $B(el).css('margin-left') ),
                          marginR = parseFloat( $B(el).css('margin-right') );
      
                      if ( marginL ) margin += marginL;
                      if ( marginR ) margin += marginR;
                  }
      
                  return el.offsetWidth + margin;
              }
          }
docs: <b>읽기전용</b>
  타겟타입:(Selector, Element)
  Padding, Border, 스크롤바가 포함된 가로사이즈 반환
  @param   {Boolean}   includeMargin   margin 포함여부
  @return	{Number}