A load when the document is loaded/ready
$(document).ready(function() {
});
which is equal to
$(function() {
});
A load each time an element with data-role="page" is showed:
$('[data-role=page]').on('pageshow', function (event, ui) {
});
When a specific data-page is shown:
$('#page18').on('pageshow', function (event, ui) {
});
Requires jQuery 1.7 or higher (the .on method was added in version 1.7)