orbit-basic/app/assets/javascripts/tinymce_orbit.js.erb

function load_tinymce() {
  $('.tinymce_textarea').tinymce({

    // General options
    theme: 'advanced',
    file_browser_callback : 'myFileBrowser',
    plugins : "autolink,lists,pagebreak,style,layer,table,advhr,advimage,advlink,emotions,iespell,inlinepopups,insertdatetime,preview,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,nonbreaking,xhtmlxtras,template,wordcount,advlist,autosave",

    // Theme options
    theme_advanced_buttons1 : "bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,|,formatselect,fontselect,fontsizeselect",
    theme_advanced_buttons2 : "cut,copy,paste,pastetext,pasteword,|,bullist,numlist,|,undo,redo,|,link,unlink,anchor,image,cleanup,help,code,|,forecolor,backcolor",
    theme_advanced_buttons3 : "tablecontrols,|,hr,removeformat,visualaid,|,sub,sup,|,fullscreen",
    theme_advanced_toolbar_location : "top",
    theme_advanced_toolbar_align : "left",
    theme_advanced_statusbar_location : "bottom",
    theme_advanced_resizing : true,

    // Skin options
    skin : "o2k7",
    skin_variant : "silver",

    // Drop lists for link/image/media/template dialogs
    template_external_list_url : "js/template_list.js",
    // external_link_list_url : "js/link_list.js",
    // external_image_list_url : "js/image_list.js",
    // media_external_list_url : "js/media_list.js"

    // Style formats
    style_formats : [
      {title : 'Bold text', inline : 'b'},
      {title : 'Red text', inline : 'span', styles : {color : '#ff0000'}},
      {title : 'Red header', block : 'h1', styles : {color : '#ff0000'}},
      {title : 'Example 1', inline : 'span', classes : 'example1'},
      {title : 'Example 2', inline : 'span', classes : 'example2'},
      {title : 'Table styles'},
      {title : 'Table row 1', selector : 'tr', classes : 'tablerow1'}
    ],

    // Replace values for the template plugin
    template_replace_values : {
      username : "Some User",
      staffid : "991234"
    }
  });
}
function myFileBrowser(field_name, url, type, win) {
    var cmsURL = window.location.toString();
      cmsURL = cmsURL.split("/");
      cmsURL = "<%= Rails.application.routes.url_helpers.file_upload_admin_assets_path %>"; 
      // console.log(cmsURL);
      // script URL - use an absolute path!
    if (cmsURL.indexOf("?") < 0) {
        //add the type as the only query parameter
        cmsURL = cmsURL + "?type=" + type;
    }
    else {
        //add the type as an additional query parameter
        // (PHP session ID is now included if there is one at all)
        cmsURL = cmsURL + "&type=" + type;
    }

    tinyMCE.activeEditor.windowManager.open({
        file : cmsURL,
        title : 'File Browser',
        width : 530,  // Your dimensions may differ - toy around with them!
        height : 350,
        resizable : "no",
        inline : "no",  // This parameter only has an effect if you use the inlinepopups plugin!
        close_previous : "no"
    }, {
        window : win,
        input : field_name,
        alt : "alt",
        title : "title"
    });
    return false;
  }
  function ajaxSave() {
    var ed = tinyMCE.get('content');
    // Do you ajax call here, window.setTimeout fakes ajax call
    ed.setProgressState(1); // Show progress
    window.setTimeout(function() {
      ed.setProgressState(0); // Hide progress
      alert(ed.getContent());
    }, 3000);
  }

$(document).ready(function() {
  load_tinymce();
});