design patterns - javascript polymorphism refactoring -

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i have object maps properties functions, this:

var objfunctions = {   prop1: func1,   prop2: func2,   prop3: func3, };

now, need valid prop name call adequate function, example

   var callfuncprop = 'prop1'     objfunctions[callfuncprop]('value1');

this works fine, however, let's new function came up, , needs additional arguments. dynamically calling function additional arguments means other functions receive them

objfunctions[callfuncprop]('value1', 'value2', 'value3');  // calls func1 defined 1 parameter

this works, have problem kind of design. how refactor code can still dynamically call functions pass additional arguments functions expects them ? avoid switch statement...


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