[[!If? &subject=`[[!getCookie? name=`fmr_Agr`]]` &operator=`EQ` &operand=`valid` &then=`[[GotoURL? &gotoURL=`13` &dontGoto=`0`]]` &else=`[[GotoURL? &gotoURL=`13` &dontGoto=`1`]]`]]
This question has been answered by Bruno17. See the first response.
[[[[!If? &subject=`[[!getCookie? name=`fmr_Agr`]]` &operator=`EQ` &operand=`valid` &then=`!GotoURL? &gotoURL=`13` &dontGoto=`0`` &else=`!GotoURL? &gotoURL=`13` &dontGoto=`1``]]]]
Then only the then or the else-part gets executed
[[GotoURL? &gotoURL=`13` &dontGoto=`0`]]
!GotoURL? &gotoURL=`13` &dontGoto=`0`
[[!GotoURL? &gotoURL=`13` &dontGoto=`0`]]
[[!GotoURL? &gotoURL=`13` &dontGoto=`1`]]
[[!GotoURL? &gotoURL=`13` &dontGoto=`[[!If? &subject=`[[!getCookie? name=`fmr_Agr`]]` &operator=`EQ` &operand=`valid` &then=`0` &else=`1`]]`]]