function valid_email(str)  
{  
var mailformat = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;    
if(mailformat.test(str))  
{    
console.log("Valid email address!");    
}    
else    
{    
console.log("You have entered an invalid email address!");    
}  
}  
  
valid_email('me-info@example.com');