Error with return statement in javascript

Question

I have this javascript code which is not working.

function myfun()
   {
       return
       {
       alert("para"); 
       } 
   };

   myfun();

I have read about the javascript's automatic semicolon insertion. I corrected the above code as

return{
       alert("para"); 
       } 

But still got the error : unexpected token (. I wonder why?

NOTE: I don't need the solution but I need the explanation why the above code in not working.

EDIT

According to the book, javascript the good parts, the return statement if returns value must be in same line as return expression.

ie

 return {
status: true
};

AND

 return
{
status: true
};

Is wrong.Then How come

function myfun(para)
   {
     var status; 

       return
       {
          status : alert(para)
       };
   };


  myfun("ok");

produce no error.It won't work but shows no error as well.It works when the { is in the same line as return.

ie

 function myfun(para)
   {
     var status; 

       return{
          status : alert(para)
       };
   };

   myfun("ok");