maintenance theme on every page

Question

On every page, maintenance theme is getting applied along with the user login boxes below the page after logging in. This is the state of the site which was handed over to me. I think this exists from a long time and no one gave importance to this issue.

This is my body tag obtained from inspect element (Chrome)

body class="marinelli html front logged-in no-sidebars page-newmain toolbar toolbar-drawer admin-menu" id="maintenance-page" style="padding-top: 65px;">

Please help me with this issue.

edit: Uncaught TypeError: $ is not a function at marinelli:133 This is the information obtained from inspecting element. It seems to be present in CDATA.. Where can i find CDATA?

    //grab all header rows
    $('th').each(function (column) {
        $(this).addClass('sortable').click(function () {
                var findSortKey = function ($cell) {
                    return $cell.find('.sort-key').text().toUpperCase()+ ' ' + $cell.text().toUpperCase();

Answer 1

Debugging is the art of removing all possible reasons why some unexpected/undesired issue arises ... so make sure your site is NOT in maintenance mode ...

To do so, navigate to admin/config/development/maintenance and ensure that "Put site into maintenance mode" is NOT (repeat: NOT) checked.