I am trying to add the tinyMCE editor to my page, remove it, then add it again but am getting errors.

When I run Part A, then Part B, Than Part A again I get the error:

Error: g.win.document is null

Source File: tiny_mce/tiny_mce.js Line: 1

Part A

tinyMCE.init({

    'mode' : 'exact',

    'elements' : '" + ctrl.ID + "Editor',

    'plugins' : 'insertdatetime,TVCMSLink,TVCMSImage',

    'theme' : 'advanced',

    'theme_advanced_layout_manager' : 'SimpleLayout',

    'theme_advanced_buttons1' : 'backcolor, forecolor, |, bold, underline, strikethrough, |, numlist, bullist, charmap, |, undo, redo, |, anchor, link, tvlink, unlink',

    'theme_advanced_buttons2' : '',

    'theme_advanced_buttons3' : ''

});

Part B

tinyMCE.getInstanceById('" + ctrl.ID + "Editor').remove();

Edit:

Below is the full JavaScript function. The first time through it opens the dialog and works, the contents is in the editor and there is no error. When I click the close button, the dialog is closed. When I run the function again, the dialog displays but the editor is empty and there is the above error.

function show_HP1B0() {

$('.EditLink').hide();

$.ajax({

    type: 'post',

    url: 'genericHandler.ashx',

    data: 'cmd=select&tableName=ExtraBlocks&id=4',

    dataType: 'json',

    success: function(data) {

        $('#HP1B0Editor').html(data['rows'][0]['Content']);

        alert($('#HP1B0Editor').html());

        tinyMCE.init({                 'mode' : 'exact', 

            'elements' : 'HP1B0Editor', 

            'plugins' : 'insertdatetime,Link,Image',

            'theme' : 'advanced',

            'theme_advanced_layout_manager' : 'SimpleLayout',

            'theme_advanced_buttons1' : 'backcolor, forecolor, |, bold, underline, strikethrough, |, numlist, bullist, charmap, |, undo, redo, |, anchor, link, tvlink, unlink',

            'theme_advanced_buttons2' : '',

            'theme_advanced_buttons3' : ''

        });

        var dlg = $('#ctl00_EXTRA_HTML_0_HP1B0Editor').dialog({

            modal: false,

            draggable: false,

            position: 'center',

            zIndex: 99999,  // Above the overlay

            width: 370,

            title: 'Content Block Editor',

            closeText: '',

            open: function () {

                $('body').css('overflow', 'hidden');

                if ($.browser.msie) { $('html').css('overflow', 'hidden'); } $('<div>').attr('id', 'loader').appendTo('body').show();

            },

            close: function () { $('body').css('overflow', 'auto'); if ($.browser.msie) { $('html').css('overflow', 'auto'); } $('#loader').remove(); },

            buttons: {

                'Save': function () {

                    tinyMCE.getInstanceById('HP1B0Editor').remove();

                    $('.EditLink').show();

                    $(this).dialog('close');

                },

                'Cancel': function () {

        alert('HP1B0Editor');

                    tinyMCE.getInstanceById('HP1B0Editor').remove();

                    $('.EditLink').show();

                    $(this).dialog('close');

                }

            }

        }).parent();

        dlg.appendTo(jQuery('form:first'));

    },

    error: function(data) {

        $('.EditLink').show();

        $('#HP1B0Editor').html('Error');

    }

});

}