Current active window bridge path

Hi

Im trying to make a context Menu script that creats several folders once i press it.

The problem is, i don't know how to get the current active window path for the creation of the folders. Im currently stuck with an absolute path.

Anyone know how i can modify the red line to make it work with the current folder path that bridge is displaying when i press the menu?

This is what i have:

#target bridge   

   if( BridgeTalk.appName == "bridge" ) {   

var Ordnerstruktur = new MenuElement( "command", "Ordnerstruktur Erstellen", "-at the end of Thumbnail","uniqueId1"); 

} 

Ordnerstruktur.onSelect = function () {  

var folder1 = Folder("~/desktop/My New Folder");

//Check if it exist, if not create it.

if(!folder1.exists) folder1.create();       

alert("Menü 1 gedrückt");

}