jQuery, new line and enter button

I'm using following code for textarea:

$('#ajaxSendMessage').live('keyup', function(event) {
    if (event.keyCode == 13) {
        controller.sendMessage($(this).val(), $("#ajaxAnswerTo").val());
    }
});

This code works, but开发者_如何学Python $("#ajaxAnswerTo").val() have new line characte when I click enter... For example: I entered: helo world and then moved cursor to helo world, updated it to hello and clicked enter. The result code will be: hell\no world.

How to remove this \n?

I think you want to catch it on keydown

see it working here on jsfiddle

If you want to go the regex route, you can simply use

$("#ajaxAnswerTo").val().replace(/\r?\n/, '');

A simple Regular Expression should do the trick:

$("#ajaxAnswerTo").val().replace(/\r?\n/, '');

$('#ajaxSendMessage').live('keypress', function(event) {
    if (event.keyCode == 13) {
        event.preventDefault();
        controller.sendMessage($(this).val(), $("#ajaxAnswerTo").val());
    }
});