Javascript passing object as function parameter

I'm quite new to javascript, so maybe it's a silly error.
I created an object like the follwing:

function objA(){
     this.prop1;
     this.prop2;
     this.prop3;
     this.func1=function(){
         alert('func1');
     }
     this.func2=function(){
         alert('func2');
     }
 }
 

I now have a function where I want to pass the object:

var foo=new objA;
 
 function test(foo){....}
 

The problem is that when I call test(), I get the functions in objA (objA.func1 and objA.func2) executed.
I would like just to get the properties value of objA.
I have to use another function and an array, fill the array with the properties of objA and then pass the array:

var arrayA={}
 
 function fillArray(data){
     arrayA.prop1=data.prop1;
     arrayA.prop2=data.prop2;
     arrayA.prop3=data.prop3;
 }
 
 function test(arrayA){....}
 

Is it the only way or I'm doing something wrong ?

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