Loading issue on website

Hi, I’m, getting a loading bar at the left side of my site and I don’t really know what causing it. I believe it has something to do with the viva thumb zoom plugin, but I have no idea why.

here is the site:
http://rebound.co.il/

There is also a problem, that the website is having problem loading from different ips… the browser (any browser) saying that the connection was reset for some reason.

Thank u very much for your time, hope I’ll get my answers here 🙂