map类型 如何返回字符串呢var mop_2=new Map();
mop_2.put("zhangsan",'20','50');
mop_2.put("zhangsan2",'220','250');
  alert(mop_1.get("zhangsan2")); 
 var st11=mop_1.get("zhangsan2");
 var arr1=str11.split(",");   
 alert((st11));  
 alert((arr1(1))); 
map类型无法赋值给变量啊