The Dashboard Studio Inspector Utility, included with the Interactive Reporting Studio installation, provides an explorer-style view of the DOM. See Dashboard Studio Inspector Utility.
The left pane displays the nodes contained within the document as a tree. The right pane displays the names of all properties of the selected node, and their current values and associated data types.
Use the Inspector Utility when writing scripts, to determine where in the DOM the data resides that must be manipulated to achieve the intended change, and to generate the path that provides programmatic access to data of interest.