//setting中配置属性
  view: {  
            showLine:false,
            dblClickExpand: true,
            showIcon: false,
            addDiyDom: addDiyDom  //自定义
        }

    //添加自定义样式函数
    function addDiyDom(treeId, treeNode) {
            var spaceWidth = 5;
            var switchObj = $("#" + treeNode.tId + "_switch"),
            checkObj = $("#" + treeNode.tId + "_check"),
            icoObj = $("#" + treeNode.tId + "_ico");
            switchObj.remove();
            checkObj.remove();
            icoObj.parent().before(switchObj);
            icoObj.parent().before(checkObj);

            var spantxt = $("#" + treeNode.tId + "_span").html();
            if (spantxt.length > 17) {
                spantxt = spantxt.substring(0, 15) + "..."; //最多显示15个字
                $("#" + treeNode.tId + "_span").html(spantxt);
            }
       }