I have a textarea where I insert n when user presses enter. Code from this textarea is sent to a WCF service via jQuery.ajax(). I cannot save n in DB as it won't show in other applications consuming the service.

How can i replace n with <br /> tag?

solution

Well many of you tried and some got right with Javascript Regex with /g (global modifier).
At the end i had n inserted twice, i don't know why, my only guess is that jQuery on keypress event created double n which i debug.

$('#input').keypress(function (event) {

    if (event.which == '13') {

        inputText = $('#input').val() + 'n';

        $('#input').val(inputText);

    }

});