className only changing every other class

Question

I\'m performing a small text with JavaScript with the getElementsByClassName() and I am getting some unwanted results. I would like the script to change each CS

Answer 1

This error is because you need to do

blockSet[0].className = 'block-selected'

You don't to write blockSet[1] , blockSet[2] ...

You can do:

for (var s=0;s