不太明白JS给一变量赋值时用大括号表示什么意思，例如this.config={ target:null,folerLink:true}
例如以下的代码
function dTree(objName) {

this.config = {

target: null,

folderLinks: true,

useSelection: true,

useCookies: true,

useLines: true,

useIcons: true,

useStatusText: false,

closeSameLevel: false,

inOrder: false

}

this.icon = {

root: 'img/base.gif ',

folder: 'img/folder.gif ',

folderOpen: 'img/folderopen.gif ',

node: 'img/page.gif ',

empty: 'img/empty.gif ',

line: 'img/line.gif ',

join: 'img/join.gif ',

joinBottom: 'img/joinbottom.gif ',

plus: 'img/plus.gif ',

plusBottom: 'img/plusbottom.gif ',

minus: 'img/minus.gif ',

minusBottom: 'img/minusbottom.gif ',

nlPlus: 'img/nolines_plus.gif ',

nlMinus: 'img/nolines_minus.gif '

};

this.obj = objName;

this.aNodes = [];

this.aIndent = [];

this.root = new Node(-1);

this.selectedNode = null;

this.selectedFound = false;

this.completed = false;

};

------解决方案--------------------
var a={a:123,b:234,c: "123 "}

相当于
var a=new Object();
a.a=123;
a.b=234;
a.c= "123 ";
------解决方案--------------------
{}是定义对象的一种方法,就像用[]来定义数组一样