JSModalWindow and query string

With WOHyperlink you can pass query string parameters using something like this:

MyHyperlink: WOHyperlink {
	action = myAction;
	target = "_blank"; 
	?queryStringParameter = "SOME_STRING_VALUE";
}

JSModalWindow does not seem to accept same.  Am I able to do this with the existing JSModalWindow or, if not, easily extend the class to do so?

Thanks in advance,
Jon