code: function () {
              var el = this.element();
              if ( el === document || el === window ) {
                  return $B.measure.windowHeight();
              } else if ( el === screen ) {
                  return screen.availHeight;
              } else {
                  var pt, pb, value = this.height();
      
                  pt = parseFloat( this.css('padding-top') );
                  pb = parseFloat( this.css('padding-bottom') );
                  return value - (( pt > 0 ? pt : 0 ) + ( pb > 0 ? pb : 0 ));
              }
          }
docs: <b>읽기전용</b>
  타겟타입:(Selector, Element)
  Border, 스크롤바, Padding이 제외된 세로사이즈 반환, screen 지원
  @return	{Number}