phone.replace(/^(\d{3})-?(\d{3})-?(\d{3})$/, '$1-$2-$3');

var abc = $(this).val();
        if(abc.length > 2 && abc.length < 4) {
            abc = abc.substring(0, 3) +'-';
        }
        
        if(abc.length > 6 && abc.length < 8) {
            abc = abc.substring(0, 7) +'-';
        }        
        
        if(abc.length > 8 && abc.length < 11) {
            abc = abc.substring(0, 11);
        }
        
        $(this).val(abc);