jQuery validating an CSV email array without the Validation Plugin...?

Question

I have a textarea field that a user can upload a CSV file to populate the field. I then need to validate each one..here is the code I have but no luck:

        validateEmails = function(emailAddress){
            var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
            return reg.test(emailAddress);
        }

                        for (var i = 0; i < reciparr.length; i++) {
                            var postDataMiddle = "";
                            if (reciparr[i].length > 0){
                                if(validateEmails(reciparr[i]))
                                    // Post my data here
                                else
                                {
                                   //Show error
                                    return false;
                                }

                            }
                        }

Any idea Ninjas??