What device IOS, Android, desktop browser? Tried several browsers received no JavaScript error. I did not log-in, I cannot read Hebrew. Use your device/browser's error console to located the JavaScript error.
I did not find a JavaScript error but my browser shows a "NetworkError: 404 Not Found - http://pizz.co.il/newcs/387.png. Which means the image is missing from that location.
Good Luck
try register and go to private meseges' the buttons are only text' also in the wuick comment and many other places.