Is it possible to use a for loop in <select> in html? and how?

[javasike]

I am trying to use a for loop in html but i dont even know if this is possible. Is it? and if yes how? I dont want to use php. only html and javascript. this is my goal: i have a file containing .txt files. i want to count the number of txt files and when i get the number i want to send it to where i will use a for loop to put the txt file's numbers in a dropbox.Thanks