Linking Javascript call from Zen pages

Hi Guys, I'm resending this because I sent on the weekend and looks like it has not been noticed much 

I'm not that familiar in using Javascript in Zen pages, so basically we have a priting utility (app) that requires us to add a bit of JavaScript call to facilitate printing from our Zen pages as below:

So I added XData link pasted the required script, is this the correct way?