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: 
You're not properly using method `hover`. This method expects two functions, first is called on hover and second called on blur. Also you can use `$.siblings` to find `.product-list-thumbnail`.

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

```
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>

```