Question: I'm currently learning DOS and I am trying to better organize some of my client directories. I want to create 5 folders (2011, 2012, 2013, 2014, & 2015) under each of my clients' folders, but I have a lot of clients and want to do so with a batch command.

Here's an example of my directory now:

C:\Clients\Name\

Here's what I want to do:

C:\Clients\Name\2015

I have roughly 200 different clients so individually creating these will be tedious and time consuming. Is there a way to write to all of the 'Name' folders even though they are all different?

Answer: 
I guess it's a misstyping but in your html syntax there is a dot. ".product-list-thumbnail" 
Try this.

```
 <div class="product-list">Product details</div>

```
fix the line **<div class=".product-list-thumbnail">** replace with **<div class="product-list-thumbnail">**

..And here we are ;)

```
$('.product-list').hover(function(){
  $(this).parent().find('.product-list-thumbnail').css({'opacity': '0.2'})
},function(){
  $(this).parent().find('.product-list-thumbnail').css({'opacity': '1'})
});

```