ddAuthTree.tree({                lines: true,                checkbox: true,                cascadeCheck: true,                lines: false,                url: authTreeUrl,                onLoadSuccess:function(node,data){                    ddAuthTree.find("ul >li:not(:has(ul))").css(‘float‘, ‘left‘);   // 选择最后一个节点 并添加 float:left                    ddAuthTree.find("ul >li:has(ul)").css(‘clear‘, ‘both‘);         // 给非最后节点添加 clear:both                 },                onClick: function (node) {                }            });