Putting a car headrest on an office chair

[cryptic]

I don't want to do anything fancy like drilling, the old rope trick would suffice, but I need ways on tying a car headrest to my office chair. It's always very flimsy when I try my ways of doing it.

Here's a link to the chair http://www.officeworks.com.au/retail/products/Furniture/Chairs/Office-and-Task-Chairs/OWNOVAPLBL

That's basically what it looks like.

[admin]

Hi there, you could use a couple of ratchet tie downs to keep the head rest on?