Debugging ASP JavaScript Errors

When there is an error in your Javascript, the server experiences an error: 500 (Internal Server Error). It also sends, via responseText an HTML-formatted error message specifying the reason for the error. Always include a DIV in your development web page to monitor ASP errors.
Scenerio:
Send a request to the server to change the circle color. The ASP file responds with an error. The error is displayed within a Div: aspErrorDiv

Select Color:
SVG Source:
Javascript:

Classic Asp file: R2_changeCircleColor.asp
OK in:IE11/CH41/FF35