I found myself in a quite difficult situation. I have a script calling this custom function:

HorButton (SideX,5,25,"HOME",11,1,BackSxTEX,EmptyFillTEX,EmptyDxTEX,gameObject,MENU_MyShoes,MENU_LandingPage);

This function builds a dynamic horizontal button made up of three different parts and textures, with a variable lenght depending of the text lenght. Anyways, I need to pass to this function two different javascripts: one is MENU_MyShoes, wich is the script who's actually calling the HorButton function. The other javascript to pass is MENU_LandingPage, wich is the next menu that will be loaded after pressing the generated button.
And this is the whole function code. The problem is that I absolutely don't know what to insert where I wrote "?????":

public function HorButton ( SideX : float,  posX : int,  posY : int,  Testo : String,  Molt : float,  Dir : int,  TexSX : Texture2D,  TexCX : Texture2D,  TexDX : Texture2D,  obj : GameObject,  OldScript : String,  NewScript : String  ) {

/*Lots of GUI code here*/

if (GUI.Button(Rect((posX/HD)+SideX,posY/HD,(posX+TexSX.width+(Testo.length*Molt)+TexDX.width)/HD,TexCX.height/HD),Testo)){
    var NewMenu = gameObject.AddComponent(NewScript) as ?????;
    NewMenu.SideX = Screen.width*(-Dir);
    NewMenu.fase = "intro";
    var OldMenu = obj.GetComponent(OldScript) as ?????;
    if (Dir > 0)
       OldMenu.fase = "outroDX";
    else
       OldMenu.fase = "outroSX";
}

Thanks for everyone who can help!