Progressbar methods

In addition to the common API methods that are exposed by all library components, such as destroy, disable, enable, and option, the slider API also exposes the value method which is a shortcut for using the option method to set the value of the progressbar.

For example, we can do exactly the same as we did in the last example, but with less code using the value method. Change the final <script> element in progressbar3.html so that it is as follows:

<script type="text/javascript">
  $(function() {

    $("#progress").progressbar();
          
    $("#increase").click(function() {
          
      var currentval = $("#progress").progressbar("option", "value"),
      newval = currentval + 10;
          
      (newval > 90) ? $(this).attr("disabled", "disabled") : null;

      if(currentval < 100) {
        $("#progress").progressbar("value", newval);
        ($("#value").length === 0) ? $("<span>").text(newval + "%").attr("id", "value").css({ float...