code: function(){
  			var oThis = this,
  				w = 0;
  			this.firstColumn = true;
  
  			$.each(this.gridCompColumnArr,function(){
  				if(this.options.visible){
  					w+=parseInt(this.options.width);
  					this.firstColumn = oThis.firstColumn;
  					oThis.firstColumn = false;
  					oThis.lastVisibleColumn = this;
  					oThis.lastVisibleColumnWidth = this.options.width;
  				}
  			});
  			this.contentRealWidth = w;
  		}
docs: /*
  column是否显示处理，只在初始化gridCompColumn对象时调用，其他时候不再调用
  计算固定区域及内容区域的真实宽度
  计算第一列
  计算内容区域最后一列显示列