Sys.ParameterCountException
Raised by the Microsoft AJAX Library framework when an invalid number of arguments have been passed to a function or method.
Remarks
When a client function or method is called and an invalid number of arguments have been passed to it, a Sys.PageParameterCountException object is created by using the Error.parameterCount function.
For more information about how to raise this error, see Error.parameterCount Function.
For more information about how to handle error conditions, see Debugging and Tracing AJAX Applications Overview.