Answers for "jquery change text by id"

jquery change text of div

$('#dialog_title_span').text("new dialog title");

how to change the text using jquery on click

$(document).ready(function () {
    $("#fold").click(function () {
        $("#fold_p").fadeOut(function () {
            $("#fold_p").text(($("#fold_p").text() == 'Fold it') ? 'Expand it' : 'Fold it').fadeIn();
        })
    })
});