String to path

1

I have a path (String variable called “nowpath”) where a value is pushed into temporarily, for instance ui.par1.blocktint
The specic movieclip on the end of the path (blocktint) has a function implementback() and if I directly test out

test3 = _root.ui.par1.blocktint;
test3.implementback();

It executes this function. That works properly. But not when trying

test3 = "_root."+nowpath;
test3.implementback();

So I started testing with square brackets, for instance directly testing

test3 = _root["ui"]["par1"]["blocktint"];
test3.implementback();

Works as well. So I split the path with an extra function to imediately rejoin into variable “ob”

 var results:Array = nowpath.split(".");
 for(j=0;j<results.length-1;j++){
  ob += '["'+ results[j] + '"]'
 }

So that “ob” outputs like [“ui”][“par1”][“blocktint”] and then I try

test3 = "_root"+ob;
test3.implementback();

Still no luck. I’m having a lot of dificulties concatenating the test3 from “_root” and the nowpath variable

Anybody any clue what goes wrong?
t.i.a
P