public LiveDataSeries addJavaScriptParameter(final String parameterName, final String javascriptExpression) {
		this.javascriptParameters.put(parameterName, javascriptExpression);
		return this;
	}
public LiveDataSeries addJavaScriptParameter ( final String parameterName , final String javascriptExpression ) { this . javascriptParameters . put ( parameterName , javascriptExpression ) ; return this ; }
Adds a javascript parameter that will be passed into the
{@link #update(LiveDataUpdateEvent)} method.

@param parameterName
the name of the parameter
@param javascriptExpression
a javascript expression. The value this expression evaluates to
will be transmitted to the server via AJAX and will be passed into
update(LiveDataUpdateEvent). The javascript expression
may be a function call or a literal. If it is a literal string,
you have to surround the string with single quotes. Don't use
double quotes in an expression since they are not escaped correctly.
@return this object for chaining