code: function getResizeLineByUETable() {
  
          var lineId = '_UETableResizeLine',
              line = this.document.getElementById( lineId );
  
          if( !line ) {
              line = this.document.createElement("div");
              line.id = lineId;
              line.contnetEditable = false;
              line.setAttribute("unselectable", "on");
  
              var styles = {
                  width: 2*cellBorderWidth + 1 + 'px',
                  position: 'absolute',
                  'z-index': 100000,
                  cursor: 'col-resize',
                  background: 'red',
                  display: 'none'
              };
  
              //切换状态
              line.onmouseout = function(){
                  this.style.display = 'none';
              };
  
              utils.extend( line.style, styles );
  
              this.document.body.appendChild( line );
  
          }
  
          return line;
  
      }
docs: 获取与UETable相关的resize line
  @param uetable UETable对象