List manipulation in XUL

I'm trying to figure out an easy way to edit/add/delete items on a list in XUL. My initial thought is to have a separate file to handle all of this but I'm not sure on how to affect the main XUL with another file. So far my list looks like:

<?xml version = "1.0"?>
<!DOCTYPE window>

<window title = "Hello"
xmlns:html="http://www.w3.org/1999/xhtml"
xmlns="http://www.m开发者_开发百科ozilla.org/keymaster/gatekeeper/there.is.only.xul" >

<script>
</script>
<listbox id = "mainList" flex = "1">
    <listhead>
    <listheader label = "Album Name"/>
    <listheader label = "Artist"/>

    <listheader label = "Year"/>
    <listheader label = "Sales"/>
    <listheader label = "Rating"/>
    <listheader label = "Genre"/>
    <listheader label = "Edit" />
    <listheader label = "Delete"/>

</listhead>

<listitem id = "1">
    <listcell label = "OK Computer"/>
    <listcell label = "Radiohead"/>
    <listcell label = "1997"/>
    <listcell label = "Platinum"/>
    <listcell label = "5/5"/>
    <listcell label = "Alternative Rock"/>  
    <button label = "Edit" oncommand= "editItem()"/>
    <button label = "Delete" oncommand = "deleteItem()"/>   
</listitem>

<listitem>
    <listcell label = "The Moon and Antarctica"/>
    <listcell label = "Modest Mouse"/>
    <listcell label = "2000"/>
    <listcell label = "Gold"/>
    <listcell label = "4.5/5"/>
    <listcell label = "Alternative Rock"/>
    <button label = "Edit"/>
    <button label = "Delete"/>
</listitem>
<listitem>
    <listcell label = "Pinkerton"/>
    <listcell label = "Weezer"/>
    <listcell label = "1996"/>
    <listcell label = "Gold"/>
    <listcell label = "5/5"/>
    <listcell label = "Alternative Rock"/>
    <button label = "Edit"/>
    <button label = "Delete"/>

</listitem>
<listitem>
    <listcell label = "Helplessness Blues"/>
    <listcell label = "Fleet Foxes"/>
    <listcell label = "2011"/>
    <listcell label = "Gold"/>
    <listcell label = "4/5"/>
    <listcell label = "Folk Pop"/>
    <button label = "Edit"/>
    <button label = "Delete"/>
</listitem>
</listbox>
</window>

Pretty simple but I'm confused about what javascript I need to make the buttons actually work. Ideally I'd want to have an Add button that will open a new window with blank fields for each of the columns, and then add the new row to the list. What would be the best way to accomplish this?

You use the regular DOM manipulation functions. When adding items dynamically it is easier if you have a "template" somewhere that you can clone and modify, e.g.:

<listitem id="template" hidden="true">
    <listcell class="album"/>
    <listcell class="title"/>
    <listcell class="year"/>
    <listcell class="group"/>
    <listcell class="rating"/>
    <listcell class="category"/>  
    <button label="Edit" oncommand="editItem()"/>
    <button label="Delete" oncommand="deleteItem()"/>   
</listitem>

You can then add a new item like this:

var item = document.getElementById("template").cloneNode(true);
item.removeAttribute("id");
item.removeAttribute("hidden");
item.getElementsByClassName("album")[0].setAttribute("label", albumName);
item.getElementsByClassName("title")[0].setAttribute("label", songName);
...
document.getElementById("mainList").appendChild(item);

Changing text of an existing item is similar. You have to get the new text from somewhere - adding text fields for editing is your responsibility however, the list has no built-in editing capabilities.

Removing items is obviously simpler:

var item = document.getElementById("item1");
item.parentNode.removeChild(item);