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At some point in your experiences with Ajax, you re likely to want to append a row to an existing table using JavaScript or to create a new table with rows from scratch. The document.createElement and document.appendChild methods make this easy to do. You just create table cells using document.createElement, and you add the table cells to table rows using document.appendChild. The next logical step is to append the rows to the table using document.appendChild. This works as expected in modern browsers such as Firefox, Safari, and Opera. Using 3565005953993bd3170c41194f12907b Internet Explorer, however, the rows never show up in the table. Worse yet, Internet Explorer

Nice Menus (http://drupal.org/project/nice_menus) provides both horizontal and vertical expandable menus. It uses the Superfish jQuery plug-in for all browsers and falls back to CSS only if JavaScript is disabled on the browser; you can also disable Superfish to provide a CSS-only expandable menu. Navigate to the project page for a full description of this module, including documentation, troubleshooting tips, and more.

The Service Manager objects work with the Port object as extensions into a processing pipeline for incoming and outgoing messages. Service Managers automatically process messages as long as the associated service method has the appropriate annotations. Figure 9-2 shows the architecture of the port processing pipeline, including Service Managers.

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doesn t even throw any errors or give you a clue as to why the rows are not displayed even though they are appended to the table. In this case, the workaround is simple. Internet Explorer will allow tr elements to be added to a tbody element, just not directly to the table element. For example, if you defined an empty table like this: <table id="myTable"> <tbody id="myTableBody"></tbody> </table> the correct way to add a row to the table would be to add the row to the table body instead of to the table, like so: var cell = document.createElement("td").appendChild(document.createTextNode("foo")); var row = document.createElement("tr").appendChild(cell); document.getElementById("myTableBody").appendChild(row); Fortunately, this method works in all modern browsers, including Internet Explorer. Stay in the habit of always using table bodies within your tables, and you ll never have to worry about this issue.

Nodequeue (http://drupal.org/project/nodequeue) is similar to the Flag and Flag Weights modules in that it allows site administrators to place nodes in an arbitrarily ordered group. The main difference, aside from a few configuration options, is that Nodequeue automatically creates a nodequeue administration page accessed on every node page through a menu tab. I use this module when a site requires one or more blocks to which nodes are promoted. For example, the homepage of a site might have a block that rotates images using the views slideshow module, and the client may want to promote only four images to that block at a time. Using Nodequeue, I can add a front-page slideshow nodequeue that allows up to four nodes to be added at a time, to which the client can add, remove, and order nodes. The nodequeue is then added as a filter to the view so that only nodes added to the nodequeue are displayed.

The Panels module (http://rupal.org/project/panels) allows site builders to create customized page layouts using a simple drag-and-drop interface. One of the advantages of Panels is that it allows content placed on the page to be aware of what else is being displayed. For example, a block in the

The transport and formatter layer is the low-level infrastructure that sits below the activity that is occurring in the port processing pipeline. You will rarely need to interact with the transport and formatter layer directly, beyond specifying what the service will support. You can also specify directional message transport information, such as whether a service is receive-only or is enabled for both send and receive operations.

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