1  ddAuthTree.tree({
 2                 lines: true,
 3                 checkbox: true,
 4                 cascadeCheck: true,
 5                 lines: false,
 6                 url: authTreeUrl,
 7                 onLoadSuccess:function(node,data){
 8                     ddAuthTree.find("ul >li:not(:has(ul))").css('float', 'left');   // 选择最后一个节点 并添加 float:left
 9                     ddAuthTree.find("ul >li:has(ul)").css('clear', 'both');         // 给非最后节点添加 clear:both 
10                 },
11                 onClick: function (node) {
12 
13                 }
14             });