The two places where inline scripts occur are the <script> element and the action handlers of display elements.
There is a special namespace Dsp available in all scripts. This namespace contains the IDs of all display elements.
Action handlers such as on-click provide a convenient reference self for addressing the display element of the action handler. Instead of self, you can also use the element's ID within the Dsp namespace, of course.
<image id="myimg" uri="gfx/button.png" on-click="self.uri = 'gfx/button-clicked.png'"/>
is equivalent to
<image id="myimg" uri="gfx/button.png" on-click="Dsp.myimg.uri = 'gfx/button-clicked.png'"/>
Some actions create an event object with information about the action. A click action, e.g. generates an event object with information about the mouse button that has been clicked.
The event object is a property of the display element, and can be accessed through the event property. Each event object has a set of properties itself, depending on the particular action. The event object of the click action, for instance, has a button property.
<image uri="gfx/button.png" on-click="print self.event.button"/>
See Common Tag Attributes and Handlers for a description of the event objects.
Elements within an <array> tag can be addressed through a special array notation with index numbers:
<array length="5"> <label id="mylabel" value="I'm a label"/> </array> <script> # change the value of the fourth element (index 3) in the array Dsp.mylabel[3].value = "I'm just a label" </script>