removing cropmarks created by cropmarks script

[bbbong]

I created crop marks around several text boxes using the javascript cropmarks. After entering additional text I want to remove all the crop marks around the text boxes. Is there a script that can remove those cropmarks after entering other text or performing other adjustments? Control Z will remove only one crop mark at a time and only immediately after running the cropmarks script.

[G.Singelmann]

Aren't the crop marks created on their own layer?