检测任意数据类型

function type(target){
                          var ret=typeof(target);
                          var template={
                              "[object Array]":"array",
                              "[object Object]":"object",
                              "[object Number]":"number-object",
                              "[object Boolean]":"boolean-object",
                              "[object String]":"string-object",
                          }

                          if(target==null){
                            return 'null';
                          }
                          if(ret=='object'){
                            var str=Object.prototype.toString.call(target);
                            return template[str];
                          }else{
                            return ret;
                          }

 }

var obj1=[{a:1},{b:2},{c:3},{d:4}]
type(obj1)  //"array"

type(new String('123')) //"string-object"