How i can access instance of class variable dynamically as text..? +example

1

i have instance of class on my main movie :
_root.mc.HelloClass.variable1.fullurl
so my HelloClass exteds movieclip and has var named Variable1 that also class with var fullurl

i want to access fullurl string value dynamically , somthing like:
_root.[“mc”].[“HelloClass”].[“variable1”].[“fullurl”]
so i can access every var from external swf

thank you !!