Calling a function and passing parameters via Variables

Question

I've got an XML file that is loading in data and is calling functions.
I've figured out how to call the methods from classes with variables set from the XML file:
var functionToCall:String = xml.functions.func[0].to_fire.toString();
myClass[functionToCall]();
This calls the function perfectly.
I was wondering if there is anyway to pass parameters into the function as well through variables.  Some functions may have no parameters, some functions could have 5... so the xml could be like this:
<functions>
   <func>
    <to_fire>function1</to_fire>
    <param>
     <value>true</value>
     <type>Boolean</type> <!-- Must be set to Boolean, String or Number -->
    </param>
   </func>
   <func>
    <to_fire>function2</to_fire>
    <param/>
   </func>
   <func>
    <to_fire>function3</to_fire>
    <param>
     <value>false</value>
     <type>Boolean</type> <!-- Must be set to Boolean, String or Number -->
    </param>
    <param>
     <value>My String Value</value>
     <type>String</type> <!-- Must be set to Boolean, String or Number -->
    </param>
    <param>
     <value>10</value>
     <type>Number</type> <!-- Must be set to Boolean, String or Number -->
    </param>
   </func>
</functions>
whats the best way to set something like this up?

Answer 1

how would I set something like that up?
in the class:
public function myFunction(_param1:String, _param2:Number):void {
then to call it, would ParamTypes be cast as an array or object or something?
var functionVariable:String = "myFunction";
myClass[functionVariable](??);
Or do I structure the XML file in some way to pass in the information?