Oleg, try using a different web browser. I usually have at least four
on any system I use regularly (for example Firefox, Opera, Chrome, and Safari) and I actually have come across pages that only work correctly on one or two of those, and not always the same ones.
Also note that if you run certain types of security add-ons (such as NoScript under Firefox) it can cause certain pages not to work, unless you whitelist that site in the software or allow scripts to run, etc. And even then there are times when using a different browser may be the only thing that works. For example, using the OBiTALK portal, I can't get tooltips (what you see when you mouse over the
symbols) to display in Firefox, but they work fine in Safari (and yet I will bet that not all Firefox users have that problem - it probably depends on which add-ons you are running).