Clean up parameter inclusion logic and update demos to use GET where appropriate, rather than hiding from my bad design choices

document example

www/examples/value-select.md

@@ -4,6 +4,40 @@ layout: demo_layout.njk
         
 ## Dependent Select
 
+In this example we show how to make the values in one `select` depend on the value selected in another `select`.
+
+To begin we start with a default value for the `make` select: Audi.  We render the `model` select for this make.  We
+then have the `make` select trigger a `GET` to `/models` to retrieve the models options and target the `models` select.
+
+Here is the code:
+
+```html
+<div>
+    <label >Make</label>
+    <select name="make" kt-get="/models" kt-target="#models" kt-indicator=".kutty-indicator">
+      <option value="audi">Audi</option>
+      <option value="toyota">Toyota</option>
+      <option value="bmw">BMW</option>
+    </select>
+  </div>
+  <div>
+    <label>Model</label>
+    <select id="models" name="model">
+      <option value="a1">A1</option>
+      ...
+    </select>
+</div>
+```
+
+When a request is made to the `/models` end point, we return the models for that make:
+
+```html
+<option value='325i'>325i</option>
+<option value='325ix'>325ix</option>
+<option value='X5'>X5</option> 
+```
+
+And they become available in the `model` select.
 
 {% include demo_ui.html.liquid %}