jube-fork/Jube.App/wwwroot/kendo/examples/application/loadingpopup.html

<div id="loading" data-role="view" class="km-insetcontent" data-init="viewInit" data-hide="viewHide" data-title="Loading Popup" data-use-native-scrolling="true">
    <button id="show" data-role="button" class="km-primary">Show Loading Popup</button>
</div>

<script>
    var showButton, interval, loaderElement;

    function viewInit(e) {
        showButton = $("#show").bind(kendo.support.mouseup, function() {
                        showButton.animate({ opacity: 0 });
                        startLoading();
                     });

        loaderElement = kendo.mobile.application.pane.loader.element.find("h1");
    }


    function hideLoader() {
        clearInterval(interval);
        kendo.mobile.application.hideLoading(); //hide loading popup
        kendo.mobile.application.changeLoadingMessage("Loading...");
        loaderElement.removeClass("loaderHeading");
    }

    function viewHide(e) {
        showButton.animate({ opacity: 1 });
        hideLoader();
    }

    function startLoading() {
        hideLoader();
        var seconds = 5;

        loaderElement.addClass("loaderHeading");
        kendo.mobile.application.changeLoadingMessage(seconds + " seconds left!");

        kendo.mobile.application.showLoading(); //show loading popup

        interval = setInterval(function() {
            kendo.mobile.application.changeLoadingMessage(--seconds + " seconds left!"); //update text of the loading popup

            if (seconds == 0) {
                showButton.animate({ opacity: 1 });
                hideLoader();
            }
        }, 1000);
    }
</script>

<style>
    .km-ios #loading .km-content
    {
        background: transparent;
    }

    #loading .km-content
    {
        text-align: center;
    }

    #show
    {
        margin-top: 100px;
        font-size: 1.2em;
    }

    /* Example Counter */
    .km-meego h1.loaderHeading,
    .km-blackberry h1.loaderHeading
    {
        display: block;
        position: absolute;
        overflow: hidden;
        width: 1em;
        left: 50%;
        height: 1em;
        top: 50%;
        font-size: 1.2rem;
        margin: -.65em 0 0 -.5em;
    }

    .km-material h1.loaderHeading,
    .km-flat h1.loaderHeading,
    .km-android h1.loaderHeading,
    .km-wp h1.loaderHeading
    {
        display: block;
    }

    .km-ios h1.loaderHeading
    {
    	font-size: 1rem;
    }
    .km-meego h1.loaderHeading,
    .km-blackberry h1.loaderHeading
    {
        font-size: 1.5rem;
    }

    .km-android-light h1.loaderHeading
    {
        color: #222;
    }

</style>