js 克隆一个对象或数组

          function cloneFun(obj){
            if(!obj||"object" != typeof obj){
              return null;
            }
            var result = (obj instanceof Array)?[]:{};
            for(var i in obj){
              result[i] = ("object" != typeof obj[i])?obj[i]:cloneFun(obj[i]);
            }
            return result;
          }

例：

          var objTest = {
            param1:{
              p1:1,
              p2:2,
              p3:3
            },
            param2:4,
            param3:5
          };
          var arrTest = [1,[2,3,4],5];
          var objResult = cloneFun(objTest);
          var arrResult = cloneFun(arrTest);